As shown in the picture below on the upper left, I've tried many ways to attempt to drag that tiny blue bar all the way to the right so the picture will play throughout the whole clip. I can't seem to do that though and I'm not sure what this issue is, I don't remember running into this issue before. Many thanks in advance!
Try enabling time remapping, then just drag it out as usual
You have imported a single image as an image sequence. Remove the image from the project panel and import again and make sure image sequence is not checked.
Worked great, thanks!