Hello all! I found this forum a few days ago and it has been interesting reading about your trees and looking at the pictures you submit of them.
I am a total rookie when it comes to bonsai, (and plants in general), but I got a bonsai (from seed) kit as a gift and planted it and now I wonder if it's already time to repot the little guy, or if it is too early in the process. Or maybe you can tell from the picture if something already has gone wrong.
I planted the seed early April this year.

Cheers, Björn

There is no such thing as bonsai seed they are tree seeds, and a total con. You will need to grow this seedling for the next 4 or 5 years outside not in and then there will be something to do. In a year or so it might be big enough to pot on, but not now.

Welcome and congrats, it looks healthy!
But...
Pines are slow growers, and there's nothing much you can do now; let it grow!

I like that you are working with it on a slant. I want to do this with my rocky mountain pine.

on a slant? That's because it is top heavy

sorry, I thought that might be on purpose

Nicely done and good result.

Do you keep it outside? I hope you do.

What you should aim for is one branch very low that you keep short. Then let the main trunk grow tall. This will create thickness. You later cut away the main trunk and work with the small low branch to become the full tree.