Hey Mark, your trees are looking great!
I would wait on doing any pruning until early next Spring, just before the trees break from dormancy. I would also hold off on planting them until then or even in the Fall of this year.
Depending on what you’re going for, you may want to trim off any branches that are too low to the ground. Anything that will interfere with mowing around them or anything that will sag and touch the ground under the load of fruit should probably go. I think a lot of folks recommend the first set of scaffold branches around 30" or so from the ground.
There are a lot of different ways to go from there depending on how you want to grow the tree (central leader, open center, or a modified central leader). There are tons of threads on here from other folks asking about pruning. Just do a few searches in the search bar and I’m sure you can find them. They really helped me when I first started pruning.
I will also leave this video here (he has a few in this little series). He’s a member on this forum too I think. I found it really well done and easy to follow!
You can also check out this pruning guides thread from the guides tab on the website (tons of good stuff in there)
Welcome to the community!