You can head to https://steemit.com/@steempixels for more info or the actual pixel art page https://steempixels.com/, log in and do some pixel art
I think they use steemconnect to log in and the pixel uses comment function of steemit so you can insert a pixel once in 20seconds only. If you head to my profile, almost 90% of the posts are from doing the pixel art.

I guess you already visited the link I provided and some of the pixel art are very nice. And true that experience counts and we do have to put extra time and effort. Thanks!