Welcome, and congratulations for getting yourself focused on this stuff early! Many people don't even pause to think about the kind of things you have mentioned for a couple more decades, and then it takes them much, much more effort and pain to realize a gain than it would have if they had taken things seriously earlier.
My only advice is to get as much knowledge as you can about your various options, and then form a solid plan about what you want to accomplish. Quantifiable goals are much more motivating than vague castles in the air. Once you know what you want, promise yourself that you will actually work to achieve it, and then be sure to reassess periodically if your current actions support your long range goals.
I don't know what your future plans are regarding moving out on your own, buying a house, starting your own family, or anything like that, but just remember that it is easy to get caught up in the moment and lose sight of long term goals if they aren't clearly stated and you don't have a good way to measure your progress. "Oh, this situation is different! I don't have a choice!" Uh huh. Yeah, you do. You can choose to be true to your own goals, or you can choose to bend to outside expectations and suffer for it for the rest of your life.
When you're just starting out, you can get carried away and convince yourself that you can do anything - meet your expectations, those of others, etc. But when you try to do everything, usually you accomplish nothing, so a specific set of goals is going to be your best helper in this endeavour. It will save you from the lies you'll try to tell yourself as well as from the manipulations of others who do not understand your goals.