To check to see if your passwords were compromised you should use this link
https://haveibeenpwned.com/Passwords
Input your password and it will tell you if it has been a part of any leaks. The passwords you input are not stored in any fashion and are searched using a secure hash system so it's relatively safe.
I would actually suggest using unique passwords of your own making for every account and keeping a physical or stop gapped record of them for reference. The most secure passwords are generally just strings of random words out together to create something like
https://haveibeenpwned.com/Passwords
Input your password and it will tell you if it has been a part of any leaks. The passwords you input are not stored in any fashion and are searched using a secure hash system so it's relatively safe.
I would actually suggest using unique passwords of your own making for every account and keeping a physical or stop gapped record of them for reference. The most secure passwords are generally just strings of random words out together to create something like
TaffyGritSuspenders
So just come up with some random words and put them together. I find that the more random and bizarre they are the easier it actually is to remember these passwords. You can then alter it to include numerals or symbols if needed. Only use each password with a single account online. Never use the same words or phrases across multiple passwords and you'll be as secure as you possibly could be.