Replying to Beginner Progression

I've been skiing for years, but this year I bought myself some afterbangs and committed to actually improving. So this weekend I went out to the hill, I chose a flat rail and thought "I'm going to get at least one good hit on that by the end of the day if it kills me." After hiking it like 25 times I finally got 2 good hits, but no consistency. It got to a point where I was so tired and worked that I was actually getting worse so I stopped. The next day I did the same with a different rail but I was also very inconsistent there. I had nobody to coach me so I didn't know what I was doing wrong. I need some tips for hitting rails and also basic spins off jumps. Advice is welcome