Hi @neeny
It's normal to stress about how you will manage but, in my experience, people cope with cancer the same way they deal with any major challenge in their lives. Some circle the wagons and get every man and his dog involved, others knuckle down and quietly get on with it on their own.
We all have our own needs and--also from my own experience--while cancer treatment absolutely sucks if you have to do the whole enchilada, there is not that much help anyone can give you that you can't go without in a pinch. Your mum might be the major hurdle, the rest is mainly logistics.
Good luck and keep plodding forward, it's the only way through this mess. Mxx