I am really pleased that you have reached out when you are feeling so very overwhelmed at "what the future holds". I am a 45 year old mum and I see these same concerns in my 15 year old son. Life is really quite different to when I was your age and I am really kind of sorry about that. There is so much pressure on "what do you want to do when you are older?", "what do you want to study at uni?", "when are you going to get a job?"....Can I say to you , I am still figuring out what I like, my hobbies change all the time, I am not even sure I have one thing i really love at the moment, especially at the moment with all these COVID changes to our lives. Can I say that THIS IS PERFECTLY FINE...you don't have to figure it all out today, you don't have to figure it out tomorrow, I think the best advice I have is to do one day at a time, the very best you can. If that is at school, do the classes today, give it your best.
Things in life will cross your path and you can see if they interest you, if not that is fine too. Some people know at 9 years old that they want to be a nurse and they fulfill that and go on to work as a nurse until they retire, that is what works for them. Some people change jobs 10 times in their life, and that is fine too. I think you just need to try different things and see what talks to your soul. The key really is happiness and I really do believe in the saying "If you can do something you love you will never work a day in your life." This is so very true, however also does not happen for everyone, as you say...we get stuck in a yukky job with no vision and no inspiration, just to put a meal on the table and pay the bills, this is a little sad however, maybe those people get joy from other things too...it is such a personal journey.
You will find passion, who knows what it will look like and what form it will take, but now I think you are so busy trying to "figure it all out" that you are not actually having time to stop, to breathe and to enjoy each moment as you are so worried about "supposed to"...supposed to be doing this, supposed to be doing that...supposed to have it all figured out.
I am so proud you reached out to chat and I am not sure if I have helped at all but I hope that you can take each day at a time, life is short and you will figure out who "sadgirlhours" is...although I hope we can have a happier nickname for you...life is a journey.
Chat to you some more if you like to.