Congratulations!! And happy birthday!!
You will do fine on your own! I'm sure it seems scary but the independence is thrilling! Try to write things out and set a budget. Do you have a community support worker to help with details like these once you have your own space? They will usually come to you in your home if you're comfortable with that. Mine is through where I see my psychiatrist. My CSW only has to see me once a month to keep me open within the program but more if I need her. We have been focusing on work lately but avoiding homelessness beforehand. They can help with so many things!! Look at it maybe as a new beginning and maybe not worry so much about your mom and brother.. he's off living his life right? And if your mom needs extra help with things I'm sure there are programs she can utilize for assistance. Not depend on you at every moment. You need to live your life too!!