At your membership level you need to use a photo hosting site like imgur.com. If you were a Gold member or higher (paid memberships) you could post pictures directly from your computer. If you want to learn more about paid memberships click on the "Paid Subscriptions" button in the blue banner across the top of the screen.
UPDATED 2/24/24
Imgur has changed how you use their site so I have updated this tutorial.
Here's a tutorial for posting pictures using Imgur. I'm not a tech savvy person who knows a lot, or much at all about computers. This is how I use Imgur to post pics.
First, create an account at Imgur.com, it's free and easy.
I suggest that you size/resize your pictures in your computer before you upload them into your Imgur album. It used to be easy to resize photos at Imgur, but that's one of the things they changed. For this forum I suggest using photo sizes of 800x600 or at most 1000x750. The pics in this tutorial are 1000x750 so you can see things better.
When you create an Imgur account, and you are logged in at Imgur, your username will appear in the upper right hand corner of the screen (I have blocked out my username from these pics). Here is a sample pic of the Imgur homepage, it will look different for you because the images on their home page change regularly. On the home page, click on your username in the upper right hand corner and a drop menu will appear like in the picture below. To go to your Imgur album and begin uploading pictures, click on "Images" in the menu, indicated by my red arrow.
Here is a picture of my Imgur photo album, yours will be empty because you haven't uploaded any pictures yet. To start the process of uploading pictures to your album, click on either of the green "New Post" buttons indicated by my red arrows.
When you click on a green "New Post" button you will see this. Click on "Choose Photo/Video".
When you click on "Choose Photo/Video" you will see the photos stored in your computer. Select the photo you want to upload into your Imgur album (I have to double click on the picture to do this).
When you have selected a photo to upload you will see your picture like this.
Click on your username to bring down the drop menu and click on "Images" to go back to your album.
Click on the picture in your album that you want to post on this forum. When you do you will see your picture look like this with a list of codes to the right of the picture. Take special notice of the BBCode indicated by my red arrow.
Now here's my low-tech, computer-challenged method for posting a picture from Imgur on Bladeforums- simply write down the BBcode exactly as it appears in the BBcode slot on a piece of paper. You will likely have to run your cursor across the code slot to see all of the code. When you write down the code be sure to include all symbols, punctuation, etc, making sure to get the capital and lower case letters correct, and type it all into your Bladeforums post. If you wrote it down and typed it in correctly the picture will appear in your post, if you didn't, it won't appear, double check the code and try again. Take note that Imgurs capital "I" and lower case "L" looks the same, so you might have to try each if any of those letters appears in the code. Some time ago I memorized the BBcode format, so all I have to write down is the 7 digit part of the code unique to the picture.
There is another computer-savvy way to post pictures from Imgur where you "copy and paste" the BBcode link, but I've never been able to make it work, I don't even know what "paste" means. To me "paste" is something we used to glue construction paper together in kindergarten. Like I said, I'm not computer-savvy (those of you who are can go ahead and snicker at my ineptness

). But obviously from my pictures in this post, and elsewhere on this forum, I've been able to manage just fine.
Good luck, I hope this tutorial helps other computer-challenged people like me.