Why can't I put this image on the right side of the page?

I'm currently working on this blog-like webpage on this URL:

https://cyhcode-webpage.cyh1368.repl.co/project.html

I wanted to put an image on the right side of the text descriptions.

I've tried floating all of them (The description and the image), but that would make some trouble if I'd like to add some other descriptions or texts.

Is there a way to fix this?