Not only will you get 100 answers from 100 riders, but, no 2 horses are the same.
We have 13horses on the farm, and have had as many as 22, and i can tell you, that i don't approach/handle any 2 of them the same. most of what you will do is going to be pretty standard, but if you will "listen" the horses will teach you as much if not more than any person. In a couple of weeks you can not expect to learn everything, or even much. Right now your concern should be getting comfortable with the horses. the rest will more or less come with experience.
As far as people are concerned, I have found that if you ask people, they will tell you one thing, and if you watch them they will show you something completely different. The best way to learn is to observe, watch the others at the rescue that get good results and take not of what they are doing. then if you have questions ask them why they do what they do rather than what they are doing.