Success stories?

25f here. I'm struggling really badly lately and honestly starting to lose hope. I have no friends, still living at home because my physical and mental health are shit, and I'm having a hard time seeing a happy future for myself. I feel really alone in my experiences and I'm worried I've missed my shot at having a good life. I know that dealing with this is a lifelong process, but has anyone dealt with something similar and is now a mostly happy, functional person?