IUI questions

Kari • Husband is 39, and we have two boys and are TTC our first baby together
Hi all! 
I have a dr appointment today in an hour and am wondering what the process is for beginning IUI treatment. 
I always feel stupid going in not knowing what to ask the dr, and telling him what I would like to do. 
I was just wondering what steps u all took to get started on ur IUI journey!
Thanks!