Question: When you apply for a subrace do you make the charecter before hand or afterward, or is it imported by a DM?

If you apply for a subrace, you will need to wait for approval before you are allowed to play the subrace.

You wait for approval first, then you log in and create the character. There's no importing involved, you just have to have the right info entered into your subrace field, but if you have the right info entered there and aren't approved, you'll be placed in a holding cell and won't be able to play the character.