Oh I have jaktup many an edge, during the "learning curve". If you don't already have 'em, grab some "gas station" knives, maybe even some "$40 knives" for you next "level up". I will be honest- the LAST thing you want to do is: grab an important/expensive knife and try ANY sharpening system (even just a flat stone) that you don't have experience on. ALL of them take practice. Also, in case no one has told you - NEVER drag a knife you give a crap about through one of those tungsten steel "cutter" type sharpeners that look like the intersection of a pair of scissors.
A guided system is great. There is a huge debate on whether the angle of the cut changes as you get further down the length of the knife you get. One YouTube guy posted "proof" that it does not BUT the amount of steel you pass OVER to get to the edge DOES change the further you get from where the (lansky type) system is clamped. My general rule on Lansky's - only for sub 5" blades and painters tape is your friend.
As for the K.O. - without the additional "Blade Grinding Attachment" I would not bother. I did not get mine as a combo, I bought (and used) the WorkSharp WITHOUT the attachment first, it almost got returned. WITH the attachment, it is awesome BUT still learn on cheapies AND keep a notebook containing what angles you used for each knife, makes touch up a lot easier.
Get a 2 sided strop and green compound the suede side. If you use your knife, strop it, you might never have to sharpen it again plus (maybe I am a weirdo but) there is something therapeutic about lightly dragging a blade across a leather paddle on your thigh, while watching TV, knowing it is becoming more an more capable of separating wtvr you swing it at each time you you drag it across.
So.... for the K.O. you gotta go "all in". There are Lansky knock offs that probably work just as well as Lansky's AND strop it. And start on cheap knives
Good luck and welcome to a never ending addiction.