(taken from the reddit, but yeah)

yessss save all the memes,, my folder has 200 rn but im sure i missed some in my gallery

Alt: An anime girl labelled "me", biting into a burger labelled "estrogen burger", with multiple food items around her labelled "5G nuggets", "pronouns fries", and "vaccine drink".

Alt: Text on top says "My brain whenever I see the colors pink and blue next to each other:", below it there is an anime girl saluting with multiple trans flags and icons in the background

This is a really well-written guide. Covers a ton of concepts in C. (Scroll up for the ToC).

There are other formats here https://beej.us/guide/bgc/