What size are you thinking? Take dresses or something for when you try them on in a sports bra I found that really helped 
Erm I guess ask the common questions about implant sizes and how he predicts they will look on you, if he wold prefer overs or under muscle implants .. He specialises in natural look as well so you’re in safe hands 
I was 28aa before which is why I had unders, hardly any breast tissue
If u need to ask anything else go ahead! Xx