How do I leave home?

Basically the only reason I've asked this is because I live in a home where no one wants to improve and everyone seems ok with being average or below average. My mother constantly is telling me I'm the only one helping her, I have a grandmother in horrible state of mind (Alzheimer). My brothers are both at shit jobs unhappy and 'in love'. I'm the only one who see's that no one in this house is happy nor going anywhere with their lives. I have a job that's OK. I am going back to community college this fall and am transferring right after to get out of this house. But what are your suggestions for separating from all the negativity in a house like this?