I just switched recently from using insecure passwords to using KeePass. I was dreading the change, but it's very easy.

I changed all my important passwords to highly secure, randomly generated ones and saved them to my KeePass database. That's it. Took me like 30 minutes. Frankly I didn't bother with accounts that don't have any important info on them.

The upside and downside of KeePass is you have to keep track of your database file - it isn't stored on the cloud, so unlikely to get hacked, but if you lose the file or your master password then it's gone forever. If the cloud hosting isn't an issue for you and you like that level of convenience, then maybe Bitwarden is a better choice.

And, since KP is offline, you don't have the same security risks as the cloud hosted password managers. If you were really paranoid, you could put your KP database file on a USB so it's never online.

Plus, even if someone were to somehow acquire a current version of your database file, it's heavily encrypted. By the time they crack it you should've changed your passwords anyway.