Pruning advice needed for young apple tree
I got a Thornberry benchgraft from Greenmantle three years ago and I transplanted it from a pot to the ground this year. It was 6' tall and had no branches so when I planted it I cut it down to about 3.5' and it's growing new branches now. The new growth looks pretty crowded to me and I'm wondering if I should thin the branches this early, or if I should just wait and let it grow for a season first.
Here are some pictures:
Thanks in advance!