Airline training is very easy if you are a decent pilot with a good attitude. I was 20 years old with 250 hours when I did my first 121 Turbo Prop initial training for a midwest based regional airline. Those were much harder than jets and back in those days, you had to study a lot more than today. Either you know how to fly or you dont. Thats what matters most in training. Know limitations and memory items. Understand the systems, dont need to know everything. A good understanding is adequate. Pay attention in class and ask questions when you need clarification. Instructors are there to help you. If you really want to be ready for a regional, I would recommend flight instructing at the FlightSafety Academy down in Vero Beach, FL. Their instructors get the best experience and all my peers from those days are Captains at Major Airlines today.