forgot passcode for my notes and tried google instructions not good

I’ll make it clear: If you forgot a Notes password there is no way to unlock the notes; this was explained when you created the password, and it was also suggested that you create a password reminder. The only good news is that you get unlimited guesses, so if you are like most people and reuse passwords, start guessing.

When I locked a note on my iphone I could open it with Touch ID but now it’s asking for a password instead which I don’t have / can’t remember. Can you help?

No one can help. Read the Apple Recommended post, right above yours.