I know the feeling. Some of the doubt will come about because of her fares and anxiety. I had friends who got so upset with me, for no reason, saying I was taking the easy option. No they see me they are now fine with it.
Please, you will find other support. Stay focus, and surround yourself with people who will support you. Your mom will eventually come around. 5k to turnaround your life, realise your dreams, live like you have never lived before, is a small price to pay!
Well done on making the positive steps to change your life!