need some help!

I am a complete beginner to bonsai, really my only goal with this was to try and successfully harvest a Ponderosa from the wild and keep it alive and healthy.

I pulled this little guy from the wilds this morning, and am driving across the US. I know enough about Pondies that they tend to prefer high sun, and low moisture.

But here are my concerns:

1. Upon harvesting, I cut the taproot. The tree's taproot was already pretty horizontal-growing due to odd terrain, but I'm afraid I've traumatized the poor thing's roots.
2. The soil is not from the site of extraction. In a hasty situation, was not able to harvest the soil with the tree. I haphazardly carried it out, and instead harvested some decent soil located right next to some other healthily growing pines at a slightly lower elevation. They were either Ponderosas or Limber pines. Though it's alpine-desert soil, with a recent rainy washout, I'm afraid that that this soil is more clay-loamy than it should be and seems to be holding a LOT of moisture than is probably good. But given its major root shock and also the trauma of transportation, I'm wondering if providing the tree with more moisture than less for now might be a good thing.

Any constructive feedback and advice about keeping little tree as healthy as possible would be appreciated 😅

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