If you're looking for a password manager that stores your data offline/locally, I like KeePassXC!

https://keepassxc.org/

My guide from 2017 https://sts10.github.io/2017/06/27/keepassxc-setup-guide.html

Official getting-started guide:
https://keepassxc.org/docs/KeePassXC_GettingStarted.html