I’m glad you’re giving this species a shot. I’ve started to really like Virginia pines and collected last month. I need to post a photo.
I think your first one shows the most promise, as I can tell it’s already beginning to show signs of mature bark at the base. I don’t know what the nebari looks like but I’d make sure you have a plan for it to help determine your front.
So maybe dig a little to get a good view of where the roots flare out. Then, get rid of any of branches that come out in a whorl, leaving only 2 to choose from at each growth node. This would apply to all the trees you’ve posted here.