Welcome to the forum!
Anyways, I'm by far an expert when it comes to planting fruit trees, but I can offer as much advice as I know. We planted apple trees on our properties this year...Two on each. As far as I know, you need at least two different trees to pollinate, and that some pollinate better than others. We planted an apple crisp and a crab apple together on both properties. Next year we're putting more in. I'm sure there are guys on here that know more about this subject and will chime in soon enough here.
Best of luck, and looking forward to hearing more from you!