Anytime I get a chance, I tell people they should be using a password manager. I don’t want to rattle on about a bunch of technical details that most people don’t care about.
If you are interested in an excellent and concise explanation of why your old approach for passwords does not work and how password managers improve your security, check out this video on one of my favorite tech YouTube channels:
My recommendation on which Password Manager to use is that 1Password is the best. The security is excellent, and it has great family and team features for sharing passwords and Vaults full of passwords. But Dave’s recommendation is also sensible.