So I haven't played OOTP since 6.5 (mainly because that was the best one

), but I heard a lot of good things about 12 so I bought it. Anyways, I'm getting my solo league setup (downloaded the "fixed" rosters, getting pictures, etc), but after reading some online dynasties I have these questions about the draft:
Do I need these "feeder" leagues like the NCAA and High School? If I don't have these leagues, what are the players in the draft like? Are they still from colleges (real ones) and high schools? Do they have like 4 years of stats (or even 1)?
Just wondering if I should download the feeder leagues or not.
Thanks for your help!