Kia ora!
I’ve been an ios user for 100 years at this point, but used to be deep in the android scene before then. I’ve just got an android for a work phone and am wondering what’s changed in the last 10 years - what are your essential apps, settings, customisations? I’ve had a hunt around xda but can’t seem to find much in the way of roms for my model (Samsung A04) - back in the day it seemed there was a thread for every device!
What do I need to know?
If you run your own Plex server, Plexamp is a fantastic music player. You do need to have a Plex Pass subscription or lifetime pass though.
Aegis and Authenticator Pro are good choices for TOTP two-factor authentication. Both are free and open-source. Authenticator Pro supports WearOS which I like since I can get my 2FA codes on my watch. Aegis is very principled and don’t allow any non-open-source code in their project. I really respect that, but it does mean that they don’t support watches, as supporting WearOS requires using a closed-source SDK from Google.
I often check out this list of FOSS Android apps. It has lots of good choices of apps and I usally end up with a good choice for my use case.