Someone who finally answered question #1. xD Yay.
To be more precise, after I made my avatar, I screenshotted it, pushed it thru' waifu2x, remade the screenshot in SVG, removed the background to be transparent, and then I exported the image as a 4096x4096 png, then I cropped it, and then I uploaded it to GBATemp, and I used the crop tool to use the top part of the image as the avatar. You can do this by going on your profile page, click on your avatar, and then a dialog window will come up, and you can do it there.

