And just to add to this, make sure your master password is also actually secure. If your online accounts' password are secure while your password manager's password is unsecure, it defeats the purpose. If anything, it could be worse. Make sure your master password is difficult enough to guess and difficult enough to bruteforce[1].

and also, if possible, use the max number of characters for your online accounts(mostly 40 as far as I know). Your password manager generates it anyway so there should be no difference in terms of user experience.

---

[1] https://en.wikipedia.org/wiki/Brute-force_attack