go to www.keepass.info and download the password manager for your system. make all your passwords huge and complex. (capitals, numbers, spaces, special characters, >64 characters long). secure the database with a big and easy to remember password. optional: write it down and store in a fireproof safe. optional: backup database to thumbdrive(s).

then enable 2 factor authentication everywhere that involves bitcoin. if they don't offer 2fa, do not deposit.

never share you're passwords or 2fa secret with anyone. no exceptions.

this all applies double when handling other peoples money.

good luck.