I hand-lettered a logo on the corner of a sheet of paper, scanned it, then cropped out everything but the logo, turning it into a small rectangular shape. I then made modifications on Illustrator.
The problem I'm running into is when I try to upload the logo as a profile photo on Instagram, you can see black bars on top and bottom because it's rectangular. I've enlarged the artboard but whenever I save down the image, it's rectangular again.
I'm sure that what I'm trying to do is quite simple, but I need some help as I can't seem to figure out the best way to do it. I'm an Illustrator newbie, so please bear with me :)