D/s advice

I’ve always fantasized about being a sub, ive had a few men talk about being my Dom but none of them ever actually did. But I have FINALLY found a Dom. He’s also a sadist. I am so excited to do this, I know it’s going to set me free but I’m so nervous I won’t be enough for him. All we have done is talk so far and he is definitely experienced, I have never done anything like this. Help me 😭 What should I expect? What are things I should do and shouldn’t? Any kind of advice you can offer will be helpful. I just want to make him happy lol