I have a small orchard.... five types of apples, three types of peaches, two types pears and plums. Choose apples that ARE rust resistant if your with a 1/2 mile of cedars. Two types of mine are not and they get rust every year even though I spray them. Cedar apple rust don't affect the eating, but does make them ugly. Most fruit trees are high maintenance, spraying, pruning, mulching, heavy watering in first few years, fetilizing, monitoring insect activity, etc. Takes most about three or so years to produce regularly. You will have to keep them from overproducing when young to prevent damage. Most tedious is spraying program. :surrender:
As mentioned, Ag extension has all kinds of info. They'll do your soil test as well. Soil prep is very important. Some ag ext's offer classes.
I bought all my trees from Stark Bros. It was, for me, cheaper to have them shipped than my time to visit nurseries. But that may not be your case. Stark Bros. replaced a couple of my trees that didn't root for free, incl. shipping. They have good customer service and you can call with problems. http://www.starkbros.com/ They'll make sure you get the right tree for your zone and they offer pruning upon purchase if you want. They also offer the dwarf and semi-dwarf stock and will recommend correct pollinators. All of my trees are semi-dwarf, in their fourth year and very healthy. Buy some canning jars :up:
Have fun !