Hussnain Ahmad building your own password manager would actually be less secure than using a proprietary solution imo since there's a lot to it. I think you can host bitwarden locally too but password managers always encrypt the vaults with master password and only store its hash on cloud.

This is God's way of telling you to use a password manager. Bitwarden is the one I use and never had any problems. Just choose a strong master password that you can remember and have the rest of your passwords be random strings cause that way, if one password gets compromised, your entire suite of passwords is still safe. Just curate a strong master password (use roman urdu words and make it nonsensical + long, that way, it'll be quite strong)