Your parents have instilled false values in you. If you want to get a degree try to get one. It doesn't matter whether you succeed or not as long as you try and as long as it is what you really want.
Your problem is that you haven't completed the transition to adulthood. The key element is that an adult is independent. You need to become independent and take responsibility for your life. You need to figure out what it is that you want from life. Not what your parents want for you, not what society wants from you. Just imagine you are completely free to do what you want, what would you want to do? Be completely honest with yourself and set achievable targets. Then you can start taking action towards your goals.
You aren't a professional, the fact that there are limitations on how you can help her is not your fault, it's just bad luck. Your job isn't to cure her, your job is just to support her and help her get the help she needs. Leave the curing to the professionals and stop blaming yourself, in fact you should be patting yourself on the back for doing what you can and not turning your back on her.
No friends at all is worse. Keep them as friends but don't treat them as good friends. Keep some distance, don't open up to them completely. It's hard to make friends when you are completely isolated. Having fake friends keeps your social skills active and it will make it easier to make new friends, so you can use them as a stepping stone. If you are isolated you exhibit behaviour of an isolated person which messes up interactions you have with new people.
No it is a factor. Life is about balance. Making music, travelling, socialising, watching tv, playing games, listening to music, reading, dancing, studying, working, eating well, sleeping well etc etc all have value. You need to find a good balance between all the things that you do in your life. It's like climbing a ladder, climbing one rung ain't gonna get you nowhere, but keeping climbing the rungs and eventually you can get to the top of the wall.
One suggestion I would make is don't just think about what you would love to do. Keep an open mind and take the attitude that you are going to try new things, even things that don't capture your initial interest. Playing a guitar, piano, acting, singing, writing, yoga, pilates, cooking, football, cricket, chess, running etc etc. Try out as many things as you can over the next couple of years(and beyond). Try something a few times, if you like it, stick with it, if you don't take whatever positives you can, appreciate whatever you learned and whoever you met and then go and try something else.
), work at it and you can knock off that requirement with ease!
