Just shoot then shoot somemore. I've shot few 100,000 times a years for years.. In my teens and thru my 20's use to shoot for 4 hours at mid day between hunts. 8 Hours in the off season. The last 15 years I've did most of my practice stump shooting.
If I do ,do any shooting across the back yard. It's been 1 arrow at a time 10,12 arrows quit. Shooting repleatly builds fourm and mussle memory but leads to bad habbits very quickly.
So watch out.
It all comes down to how bad you want it. To hunt,shoot good enough to kill a deer. Do it with a selfbow you've made. You'll belong to a very small group of hunters.
Hope you make it.