A tip for a much stronger password.

Use a passphrase: a sentence you can remember. Then replace each word of the phrase with its initial, a similar digit or symbol, or, at random, use a whole word.

For example: My Dad Bob Yelled At My Idiot Brother
m d b y @ m ! b

The new password is mdby@m!b.

That may still be tough to remember. If you need to, write a reminder and hide the paper somewhere safe. But write the phrase or a hint, not the password.

Generally, if you have a strong password, you don't need to change it unless you suspect you've been hacked. But don't use the same one for different services.