Hey Rose31, welcome to Beyond Blue forums. It's great to have you join us here! It sounds like a lot is going on in your life at the moment. You have many new responsibilities and are living away from your family, we can imagine this would put a lot of pressure and stress on you. For someone who is only 18, this is a lot to handle and we think most people in your situation would be feeling the same way. Please know that you don't have to go through this alone, there is help available to you.
We would recommend that you get in touch with Kids Helpline - https://kidshelpline.com.au/
It sounds like you're in a really tough situation and it might help to talk it out whenever you're feeling overwhelmed. Kids Helpline counsellors can be contacted 24/7 via telephone and also via webchat if you go through the website provided.
Thanks again for reaching out as we know that it can be really tough to do this for the first time. We hope that you find some comfort here in the words of wisdom and kindness that our community can offer.