A guy on a job site told me my passwords were trash and he was right

Last month I was killing time on my phone at a job site in Reno and a younger guy on the crew saw me type my password and said "that's just your dog's name and a 1, isn't it?" He was right, and honestly it bugged me enough that I went home and set up a password manager that night. Took me maybe 45 minutes to change my email, bank, and work logins over to random 16 character passwords, and I wrote the master one on paper and stuck it in my truck's glovebox. The annoying part is my old system was the same three passwords recycled since like 2019. How do you all keep track of the master password without just taping it to your monitor?