Welcome to the forum
I'm a first yr grower so not a lot of experience here. I have a few two yr old trees in 5g pots and about 25 that I have rooted and potted in #1 size pots this year. I'm using a 5:1:1:1 mix of pine bark mulch, peat(or std Miracle Grow potting mix in recent efforts), perlite, and Oil Absorb from Tractor Supply, with 1 cup of both dolomitic limestone and Espoma Plant-Tone in 5g of the mix. There are a lot of options-this was recommended to me by people with some experience. Do a search on the forum for potting mix, for 5:1:1 mix and you should find lots of advice and opinions
Good luck! There are a few of us from the area here on this forum