OP, here we have a prime example of someone finding a problem for every solution.
The best stuff in my life happened after I was 30. At 30, you're only 12 years into an adulthood that will, hopefully, last a very long time.
I'm 45 and starting new hobbies and new activities all the time.
At 30, I had no friends, I had just graduated and had a crappy job, i had a child but not in the greatest of circumstances and no hobbies or social life at all.
At 45, I play bass guitar in a band, I've been married, I have a Masters and a professional career, I have a full social life, friends, a boyfriend, I had another child...
There are so many women who post on here thinking their lives are over by the time they're 30, I really don't get it.
It's your choice to stay where you are and do what you're doing. Yes, crappy finances get in the way but there are other options. If you haven't completed your degree, you still have funding available, you can study through the OU on a pt basis, you could move areas if you're not actually providing care for your parents, you could join a choir, start dance lessons, go rock climbing...
Your parents will just have to do what other people do as they get older if they don't have family nearby. I certainly didnt have children so they could look after me as I age and I really hope they spread their wings far and wide!
A lot of people are still finding their feet in adulthood at 30 and very few people who do appear to have things sorted at 30 carry along that same path forever. You're no different to anyone else.
Or you could carry on as you are for the next 10 years and arrive at your 40s sad and frustrated that you made the choices you did at 30.