I would definitely tour a few stables and talk with different trainers before you make a decision to begin riding at a certain barn. Private lessons would be best for you as you are attempting to get back into riding and learn a new discipline.
I had lessons back when i was 12 or 13..it was western style. and private. and that only lasted a couple months. Parents thought it was pointless.. Anyways im 20 now and pay for it myself i was hoping to learn English and pursue that passion a little more..