I'm also only a week in, so not an expert by any means, but I wanted to let you know that if our 8 and half month old was doing as well as your baby, I'd be thrilled! It sounds like you're doing great. I'm not sure about the answer to your question. I think you just keep putting him down when he wakes up crying, until he gets used the idea that it is sleep time. I'm sure some of the other, more experienced, members will have more specific advice.
Good luck and don't give up!
Amy