It sounds like you're thinking about this very carefully - like I said, it's really great to see and I wish more teenagers had your approach!
You're absolutely right that bird boarding can be difficult - depending on what country you're in, there may be very few options or none at all. It can also be expensive: our two birds' boarding has cost more than a holiday for my wife and me! It's nearly impossible to find someone who is willing to birdsit who has the combination of time, experiemce or willingness to learn, and is liked by your bird(s).
It's a really good idea to wait until you've got those huge life changes under your belt: study and graduation; placements and internships; moving in with your partner; finding a job and perhaps buying your own home. Unfortunately landlords can be very funny about birds because they seem to think that they're all wall-destroying monsters, and if your bird should turn out to be a wall-destroying monster, it's likely to get expensive and unpleasant. The advantage of owning your own home is that it matters less if your bird decides to chomp on the doors