RE: Mixed feelings about going hunting with my brother
This is your opportunity to give back to the sport. You seem to get out of it just what the rest of us are looking for, that communion with nature. Why wouldn't you want to help someone else find that, particularly your own brother?
Teach him well, and it will reward you. You'll have a knowledgeable hunting partner when you want one, and someone to trade stories with even if you're both out on your own.
Good luck.