Congrats on exploring the part of you that is a domme!

Communication before playtime, during and after, will help you get to know his likes and limits for when you are in the "top" role.

Those lists of questions can be great for also keeping fantasy and reality in their place. What turns on us in a story might be a serious turn off in real life.

Ask him lots of questions and file away information for the next playtime. Watch movies or read stories together. Discuss what you liked and what you didn't.

I would also suggest, having a ritual at the beginning and ending of your domme sessions. This helps you both settle into the role and sets you up for success. It can be something as simple as having him kneel for you, or you asking him to do the same thing, every time. When playtime is done, you might have him stand and you kneel. Or have a phrase if you happen to be in bed.

Have fun!

Ruby