Where to start with new phone

Congrats!

Official manual:
https://docs.puri.sm/Librem_5.html

Community wiki… some of which was written for the previous amber repo/software. (The current phones have upgraded to byzantium, which has precluded the need for some of the tips in the wiki):

You might also like this running thread:

For anything else that you can’t easily find by searching the forums, just ask. Someone might have an answer.