I often feel like my life is moving so fast too and hate how I will be taking meds all my life, but you know what, it is worth it.
Either way I expect getting to Sweden will be just like getting into any other country. Get good grades, prove yourself intelligent and capable, work hard, learn the language and apply for a work visa to test the country out then if you like it, apply for citizenship. Though I don't know the specifics of Sweden itself. Why on earth you want to move into Lappland though I got no idea. I guess you travel north and pack some warm clothes cause that is legit insane, it is cold, backwards and probably bereft of all modern comforts. Sweden is nice though, mainland Sweden at least, I know some Swedes and they live well.
Oh and don't be dumb and try to join the French Foreign Legion. Please, army is not a good idea it wont force the trans out of you.
Good on you for wanting to move to Europe though 😉