1.) This post may help you but it hasn't been updated for ages (14 days): https://lemmy.fmhy.ml/post/24569
2.) For lemmy apps check out this post: https://lemmy.world/post/465785
3.) Image uploading doesn't work most of the time, we need to wait till admins find a permament fix
4.) This site is good for finding subs you're interested in but sometimes it's not updated for 1-2 days: https://lemmyverse.net/communities?query=artificial+intelligence