Where can I take classes to learn ue4? I would be fine with one on one or classrooms but I don’t know how to contact any professionals.
Hourences (www.hourences.com) will soon release a lot of hours worth of tutorials on ue4.
I dont know if they will cost anything or if he will release them for free, but knowing hourences they will be worth every penny 
there are also some crash courses you can find here: ue4 classes - Google Search
hope that helps a bit