a month late & maybe u already found out how to but heyy
you can use ImgBB to post an image here;
- upload the image to ImgBB (select "Don't autodelete")
- select "HTML full linked" on Embed codes
- copy the HTML it gives you
- then, go to "Post Forum Reply" for example, and click the "<>" on the upper left corner, it'll turn into an eye.
- paste the HTML code
- erase everything before "<img", and erase everything after "0">".
- after "0" add "width="250px" (i'm still tryna figure out how 2 make the image smaller but that's all my brain can do)


example:
- <a href="https://imgbb.com/"><img src="https://i.ibb.co/8DT6ry0P/kitty.png" alt="kitty" border="0"></a>
- <img src="https://i.ibb.co/8DT6ry0P/kitty.png" alt="kitty" border="0"></a>
- <img src="https://i.ibb.co/8DT6ry0P/kitty.png" alt="kitty" border="0" width="250px">
ALSO, i'm sure there's an easier way using Postimages but I can't remember sry