Not to doompill, but don't do it unless she's within a 2-hour car ride of where you live. Every retard with an online gf thinks "THIS time it'll WORK because we LOVE each other!!1" then immediately gets cheated on. If she's not within ~130 miles, don't do it.
As someone whose current relationship started off as that prior to my boyfriend moving in with me (me being an Europeon and him being an Amerifat) I would say it depends really.
The problem with long distance relationship is that people really underestimate how much effort you have to put in them, especially if you and that person are miles away, maybe even continents away from each other. I think something that gives these relationship a high head start is if both parties know each other for a decent amount (1-3 years) before taking it to the next step, because knowing someone for 1-3 years is a decent amount to get to know somebody and determine if you can see yourself being with them. Another issue is that usually people that are very impulsive don't really think about the gravity of situation when they get themselves into one.
The other important thing that determines if this LDR is sink or swim is if both parties are willing to take it to next level such as move in with the other person and plan out their future together, I think where most LDR sink is when parties who romanticize the distance realize they WILL have to move to the next level eventually which means both of them will have to show themselves to each other, especially the less desirable and vulnerable parts of themselves. The novelty of LDR wear off when both or just one of the parties doesn't want to move to next level and wants to keep being distant on purpose.
But should you ever want to or plan to enter a LDR with somebody, my two main advices are:
-Make sure you get to know them well and quite properly, don't push or don't
let yourself be pushed into something early if you're unsure about this person's
temperament.
-Do LDR with people that are culturally similar to you, both of
you have some knowledge about each other's cultures or your
cultures can vibe with one another just fine. Trust me on that
part.