I "lived" at home for all 4 years of college. "Lived, " in quotation marks, because I truly was rarely home. Home was a place to take a shower, eat, and sleep. I recommend trying to schedule your classes so that the break time between classes is at least two classes long. If you have classes every day , this might look like:
2:30 - 3:45 class
This gives you time to eat, and also to study. I found that a lot of people wasted the "off" time throughout the day, especially if it was only one class-length long, as it is barely long enough to get started studying and it is time to head off to the next class! I also strongly encourage you to find activities to join. I am not much of a joiner, but did manage to get involved with some political groups, which actually took me off campus to working on real campaigns. Also did charitable activities, and fundraisers during school carnivals.
Another idea, as pertains to the noisy ones in the household: You have the opportunity to be a role model for them, showing them about hard work, studying, and things like that. Depending of course on ages and dispositions, you might try to find a way occasionally to involve them with your studies. Vocabulary flashcards come to mind. You could even "pay" them to help you. . . clean their room for them, or something. I think it would be awesome for them to see someone working at learning, rather than simply thinking, "gee, she's so smart!"
Reluctantly, I am finally admitting that I in fact study better with "some" background noise, rather than silence. In fact, I used to study in the cafeteria sometimes. Only problem with this is when your friends see you and want to stop and visit.
I honestly think you will work this all out just fine, but it is good for you to be giving it a little thought right now!