I encourage you to give it a try.
1) If you were really attached to the old recruiting method, it may take some adjustment. I didn’t find it hard to learn, it was mostly pretty intuitive once I knew the mechanics; but that’s not universally true. It would be good to have a mentor for a couple seasons.
It is more realistic in some ways, in that top talent is usually battled for now; recruits have preferences meaning it’s more than prestige and open scholarships now; and most importantly, 50.1 in effort credit beats 49.9 roughly 52% of the time now, rather than 100%.
It is not completely realistic, however. Teams are still constrained by budgets linked to scholarships, coaches can still visit a kids home an absurd number of times (though 20 is an improvement from 50+), and there are some strange looking results from time to time - for example, a D3 team beating a D1 team for a recruit - that likely wouldn’t happen in real life, but happen here sometimes because coaches are making decisions which lead to those battles.
2) Sadly, no. But the good news is that it is now *much* easier to field a nationally competitive team from mid major and even low D1 conferences, so you don’t get stuck in that low D1 trap of having to put in 10 seasons of getting pounded in the first round before your resume is good enough for big 6 consideration.
3) Get a mentor if you want to hit the ground running. Otherwise, have fun!