Ha! I know who this is.
I would suggest that you put a purchase on hold and ask friends and family if you could fire their ARs if you provide the ammo. This would allow you to figure out what you like/dislike and save you a lot of money in the longrun.
I'm sure you know someone who has a lot of experience in this area, and you should recognize his talents. There's no better training than personal one on one training. If this is something you don't want to persue, wait 1 year and talk to your brother!

