It is great you have come with such a tricky question..I understand that being 24 is alot and that figuring out "what you are going to do with your life" is so very much to think about and manage. Can I start by saying that I am 44 and still "deciding what I will do when I grow up". I think we change all the time and that the path we choose today is not set in concrete and life is about growth and change. My point in saying that is try not to overwhelm yourself with trying to pave the path of forever and just take baby steps for doing what you can for now.
In saying that I feel like study is really important, you need to have something to base your life decisions on and something that can support you. If you are not enjoying it though then I would consider perhaps a change. I am by no means trying to make this decision for you as only you know what is right for you, however is there somewhere else you can stay, with other family, with a friend, what about the option of house share where you just rent a room, the cost is less and you still have your space.
I am so sorry you are not in a supportive place that is making you question your study, that is alot to deal with.
I don't know if I have been helpful but we are here, to chat and send some hugs to you LadyFlower.