My best advice for any new shooter is to spend a couple years absolutely obsessed with it. Read and watch everything you can get your hands on... Some tips that I think helped me:

1. Understand and master back tension. Back tension takes care of so many other issues if properly applied.

2. Use a weight that you can comfortably hold while you apply back tension.

3.Shoot using the gap method. Research it on the big internet forums and really get a grasp on it.

4. Shoot 3 under, it makes gap shooting 10 times easier as it puts the arrow much closer to the target. A 12 inch gap is easier to recognize than a 28 inch gap!

After a very shot period of time, GAP becomes natural and you never even think about it.

One thing that I've learned is this..... Everyone can shoot decent groups at 15 yds, even with horrible form and poorly tuned equipment. The 20-30yd shot is what seperates the men from the boys and solid, repeatable form coupled with tuned equipment makes that much, much easier..