Need help for a potential new football collector.

Hi guys. I know very little about football, and I'm strictly a hockey guy. My best friend's son recently asked me about card collecting and primarily about football cards.
He's 16 yrs old and wants to start collecting cards. He asked me where should he start since there are a million cards out there and was shocked after i showed him the
football section on ebay. He doesn't care about graded cards which is probably a good start. He said his favorite player is Adrian Peterson? if I remembered correctly.
He knows what a rookie card is cos a couple of his friends collect football and wants to buy rookies and players he thinks will have long great careers and maybe head to the HOF.
Where should he start? I told him I would get back to him after I get some advice and would luv to see this fine young man get into collecting.
I was thinking a little bit from every decade from the 80s - present of key rookies. They don't have to be premium expensive cards; maybe just low tier brands like Topps.
Thoughts please
He's 16 yrs old and wants to start collecting cards. He asked me where should he start since there are a million cards out there and was shocked after i showed him the
football section on ebay. He doesn't care about graded cards which is probably a good start. He said his favorite player is Adrian Peterson? if I remembered correctly.
He knows what a rookie card is cos a couple of his friends collect football and wants to buy rookies and players he thinks will have long great careers and maybe head to the HOF.
Where should he start? I told him I would get back to him after I get some advice and would luv to see this fine young man get into collecting.
I was thinking a little bit from every decade from the 80s - present of key rookies. They don't have to be premium expensive cards; maybe just low tier brands like Topps.
Thoughts please

0
Comments
However, tell him to collect what he likes... If he likes AP, he can collect AP, if he wants vikings, collect vikings.
I would also suggest to him to research the game and explore the rich history of the NFL as well. Down the road he might find himself interested in older cards which I think will bring more fun and open up even more interest. There are a TON of DVDs and Books out there too.
Send me a PM if he would be interested..I could throw some in to get him started. Just let me know who he likes besides AP (I have APs).
Yea, stuff like that would be great. It's fairly cheap and I think he can appreciate that.
I talked to his dad tonight and told him to pick up a football Beckett for his kid at a newstand or something. He can then get a general idea
of what it may cost him to get certain players/cards. I figured to start off, Topps would be the cheapest way to go. The kid has a part-time
job so he can buy for himself. I'm going to pick up a few topps rookie for him. Saw that A. Peterson RCs are fairly cheap, and will get one or two.
I've got a Steve Young 86 topps and a Score Barry Sanders Rc in nmt condition that's just been sitting here as well. His dad doesn't collect cards
but I think he's beginning to catch interest. I'm hoping this can get both of them into it so I wouldn't feel like a card geek when I visit them.
I'm hoping for a positive turn out. Going to see them and party with them for Memorial Day, so we'll probably talk about cards lol.