The first thing I install on any new device, whether it's a smartphone, tablet, or computer, is a premium password manager, even if that device comes with one preloaded. I've explained time and time again how crucial it is to have a service like 1Password or Proton Pass.
Password managers save all your credentials securely, so you don't have to reuse the same bad password for everything from Netflix to Facebook and your bank accounts. They can also easily generate strong passwords, and they support two-factor authentication (2FA).