I think you should study what makes you happy- and you always have time to change your mind, since many classes you need to take during your first year of college are general requirements. I also think attending a college where you can live at home is a good idea if that's what you want. I didn't want to live in the dorms either (too many parties and drinking), so I lived with my mom for a few years then got my own apartment. Plus living at home saves money!

Good luck with whatever you decide- marine science sounds very cool!