Do you like your sister and get along well with her otherwise?

I wouldn't like to be presented with a 'final deicision' and plane ticket and everything too!
Is this an example of how she has usually been with you (or others)?

Finishing high school and finding work sounds good, yeah - maybe it would be good to look at what kind of jobs are available for people with just high school where you live? You could probably do that where your sister lives too?

As for saving for a place of your own, I wish you luck, check out the price of real estate though (and approximate paychecks and costs you might get) - it depends where you live, some places are so expensive it may be difficult for a single person to save up enough to buy.

When I went flying for the first time I went with friends, so it was way easier. But it was really fun and exciting, I loved it!