Not a fight, sorry guys....

You get to choose to attend either Hogwarts or Starfleet Academy.

If you choose Hogwarts, you start out eleven years old as a first year student, just boarding the train with your supplies. You have the requisite mystic potential, and an appropriate family to lodge with when you are not in school.

If you choose Starfleet Academy, you get a data download of basic information on life in the 24th century, and begin your first day of classes as an eighteen year old cadet.

In both cases, if your body is not completely healthy, or not otherwise satisfactory, it is healed and modified within human norms.

When you're finished with your schooling, you can choose to return to our world and no time will have passed, but you retain all knowledge you acquired (you get your old body back). There is no guarantee that any magic or Starfleet tech will work in our world (I would guess not).

Or, you can stay in that universe and continue that life.

Or, you can tell the Plot Gods "no," and get a consolation prize of two hundred dollars.

How goes it?