I will add that all of the above is good advice.
We teach at the clubs that host XTC matches, and I highly recommend you check into the nearest clubs as soon as you can.
A live coach will save you a ton of time and money when you get started, especially if you don't already have a smallbore or airgun background.
Depending on your budget, and if he is still teaching, Jim Owens used to offer a multi-day clinic. He can get you going quickly as well.
His books were shown above if you are forced to learn this on your own.
Good Luck on your journey.