Depends on where you live, I would straight up not recommend going out of state. Dropping acid in the woods with a hoe would be more effective.
There's a university in Humboldt, CA which has a special 6-year sustainability program I believe. That's the best I know of, but I live on the west coast. Oregon State is pretty famous for their botany too. But in both of these places you will have to concentrate through undergrad among bunch of party kids getting high and pregnant. Please don't take out student loans.
Smartest guy I've ever seen on the internet has a youtube channel called Canadian Permaculture Legacy. You can learn a lot from there.
I would recommend going to University if you can afford it without loans, there's not a lot of places that will strap you down and force-feed you info about soils and ferns.