TAJ
I don't know about your eyes. But I had to get a special pair of glasses made so I can shoot AP. With my regular glasses, it was VERY hard to focus on the front sight, but easy to focus on the target...not good. The new glasses has a prescription that I CAN focus on the front sight w/o straining. This makes shooting AP a LOT easier.
Keep a record of your scores. It is fun to look a the scores after a few months and see how much you progresses.
WARNING, the better you get, the smaller and harder the improvements are. It is like a curve that flattens as you approach 100. When you are in the 90s, it gets almost flat. Each point of improvement is hard work.
60 to 70 was fairly easy improvement, 70 to 80 was work, 80 to 90 was hard work, scoring 90+ was infrequent enough that I called it a lucky day.
I also recorded things like time of day, temp, how I was feeling, etc.
As much as I am NOT a morning person, my better scores were in the morning.