What articles are there on the basics of PostgreSQL and its optimization?

Question

PostgreSQL

I would like to ask you to leave articles about postgresql, how to prepare it and the like.
I chose for myself a bunch of redis and postgresql purely from the opinions of society, but I don’t really understand them. Are there any differences, buns?
I would be grateful for any help)

Answer 1

For example, there is postgrespro - free of charge and in Russian. There are also books there.