Sex with very tall men. You might want to pass on it.
Another way to find out what you and your partner like is by constantly talking to each other about what makes you both comfortable and what gets you off.
Do you have a good couch or a bed with a headboard?
As the more experienced partner, you have the luxury to set the tone.
Also, he was a virgin up until last week.
If penetration is awkward and uncomfortable, you can pleasure each other in other ways.
There will be times when trying out different sex positions will cause you both to fumble or fall.
Having a big height difference with your partner can make having sex really tricky, not to mention a tad uncomfortable.
If he's new to the sex thing, getting him to calm down and take it slow and easy can be tricky.
Grab a chair; a sturdy one to be exact.