There are multiple tips to make a good password but heres 3 really good ones

1. Do not tell anyone your password. People spread things like that like wildfire, however if you are a minor, your parents should know but ONLY your parents

2. Remember your password. make sure your password is something you remember, new systems have made it so your passwords are saved but it is still best advised to make something you remember

3. Don't make it obvious, your password should be somehting you remember but not something common about you, make it something your friends dont know about you generally

Heres a website with even more tips

https://www.cisa.gov/secure-our-world/use-strong-passwords