I'd say that the notion of learning to survive in the wild with just a knife and some skills is way too ambitious if you have no grounding.
The truth is that is extremely hard for anyone to do that and a great deal of it comes down to fortitude of character, luck, location and climate. Sure you can learn your wild edibles, flint knapping, a bazillion ways to make a fire and so forth, and those things may increase your chances of success, but to begin with start small. Start very very small.
It is a matter of fact that there are way too many goons in this scene trying to peddle stuff. In that back when that stuff was just objects. Looksie “my wonderful survival wool frock and hollow handled knife, yours for just...”. These days it is even worse because what they are peddling is ego and image. It's not even all about the “hit” count and revenue, it's often a vanity thing when social media serves as a loudhailer and a mirror. You can often winnow those people out early because of their names. Anything that sounds akin “Free Spirit”, “Lone Wolf”, Survival Gimlie” or an old Indian name like “Pondersonbullshit” is usually best swerved. In fact, be suspicious of all the big name Gurus. I don't necessarily mean just mean the lowest hanging targets either. I saw one of the more popular ones that is usually age exempt from ridicule quite recently chatting crap. I'd already seem him making a bit of a clod of himself with a fishing kit he apparently had a life long proficiency with, and he gave me a real chuckle when he he tried to climb into a pack that he was advocating. This time he was offering up a cautionary take about stropping a knife by hand and how it could get so hot it could effect the heat treatment of the steel. Leave all that fiction to those that wear buckskins and play the nose flute.
That isn't to say there aren't some good stuff out there. For example Survival Russia has some good bits you can harvest
https://www.youtube.com/user/Moscowprepper A good example is the device he has to make cordage from plastic bottles or his reasoning behind his survival firearm selection. The key thing here is that he draws information from skills leaned by very poor people in a very tough climate in a way that isn't fanciful. Likewise, we all know that the fig4 trap works. I think every bushcraft course out there uses it to part fools from there money. If you want a better insight into survival trapping go look at how Pakis trap rats or Asian villagers corral small fish. Once you've grasped the principles and properties you can use other materials to catch other things. That's far more real world useful to you than the nth post showing a fig4 next to look at my fuzzy stick I made. In fact, as I type I have a guy in mind that used to post a lot of pictures showing his survival throwing stars. These were essentially two foot long bits of stick tied into a cross shape and pointed on all ends. You could point out till the cows came home that it would not penetrate a bit of toasted bread at 30paces even if you could hit it reliably. And anything bigger that you may have chance of hitting would just fart at you and run away. But literature does show that Indians did make something similar so they would be defended as worthy posts. Devoid of any context though the tyro would surely go hungry. There's loads of that kind of boswellox out there. Then we've got the axe /chopper men, like you weren't planning to stay of in the woods you were just going about a picnic, something went wrong and you were stranded overnight, and you popped out your inflatable axe that you carry on your keyring just in case. Well those people aren't worth the cheese off the dog's bits either. Being out with an axe and making a birch bark kayak is surely a fine activity on its own. Saying that has anything t do with survival though is rather like saying you have survival skills at putting out a fire when you deliberately set fire to X and brought the fire truck to put it out with. You'd be better off learning how to use a knife like the one you have in the picture to make a rake. With a rake you can make a deep thick warm debris shelter and curl up in it snuggly bug way more efficiently that knobby can be wailing on logs with his chopper. You'll be the one getting a sleep in first.
I could go on and on with my pet peeves over this stuff but I'll spare you. If you do really get into this stuff then great but start small. Do the basics of regular pedestrian camping and then feed in some skills that transfer. You can go from boiling water to how to find and clean water. What if you use a few small twigs to hold up a windshield round your stove – can that be scaled up to be an emergency fire heat reflector. Can you go from toasting something on a stick to improving that with a 3 pronged toasting stick. Can you make a pair of improvised tongs from a couple of twigs to pull a dropped sausage from where you don't want your hands. What about your fishing stuff? Can you expand your skill to make an improvised float that cocks properly? You don't have to start at the big end trying to carve salmon hooks from bits of bone and plaiting nettles into a line. Feed bits in gradually. Leave the carving shuttles to make a huge net that spans a stream till later. Why not just skin up and sit there making a small string purse net you can stick a bottle in and keep cold in a stream. Might take you an hours or so but you'll get the basic foundations right. A lot of good basic stuff used to be taught to kids everywhere as a foundation for life. When people try to look of that stuff now they often find the cartoon version with scant relevance to anything truly useful. It is one of the major differences between bushcraft and neo-bushcraft. Start by doing something useful and go whittle a clothes peg.