I rarely will send out mails for major announcements, the other purpose is to stay independent in case social media platforms change policies:
I just started, and have been working on small (100x100 max generally) images. Note my profile pic. Any tips on handling single pixels in such small pieces?
As I get more comfortable, I'll increase the size and complexity of my images, but I'm having fun ATM figuring out how to express ideas with such tight constraints. Plus I can make a lot of cool simple pics, in a fairly short time. It's fun.
Regarding to pixel art, 100x100 I'd already consider really big for a sprite.
Jus tdo more, try to find ways which work for you and try to develop and refine your techniques. Experimenting can go a long way.