You should be using Vanadium! Its a far superior browser to Brave!
I use the Protonpass password manager. I have had 0 problems with it. It autofills everywhere in GrapheneOS if you set it to autofill in Settings -> Accounts -> Autofill. Its great. Its my note app, it makes random or diceware passwords for you, makes email aliases for you, and it works with TOTP logins too. Its a great all-in-one password manager!
Protonmail is awesome. You can set it to connect with Gmail or other mail account ts and import all your mail and keep importing new mail to Protonmail. Makes migrating a piece of cake! It's encrypted automatically between Protonmail subscribers too, and you can make it encrypt easily between you and people who don't use Protonmail. $10/month is a steal for what you get.
Protondrive app also now can automatically back up tour photos too, like Google Photos but more secure, and their app doesn't need Google Play Services to run!