A white pine, in your climate, while you have no experience at all is just not likely going to be a success.
The pine may be grafted onto a stronger pine - which may be visible and hard to address. It may not be grafted, which will give an issue with growth and strength.
White pines are sensitive and require different training then black pines. They are single-flush, not multiple-flush, and pruning them incorrectly can easily kill them. Another way to quickly kill them is to do too much at once - like pruning and wiring and repotting. White pines require loads of patience. Which new starters usually don't have, they want result.
It's not a starter tree, and saying that is not being not supportive, it's encouraging you to choose a species that is more suitable for your climate and your skills.
Of course this is my opinion and not everyone will agree:
Japanese White Pine Bonsai are great Bonsai Trees for Beginners -
This tree wat not grown with bonsai in mind. It is just a young pine. Nor work on movement in the trunk.Long internodes. Lotsof branches at the same level. So.. Yeah, healthy tree. But not grown for bonsai.