Start taking some classes at a local community college. Go for general ed first but take some extra math and science classes, aiming for a science degree. Just watch your field of work, you don't want a job that could be replaced by a machine, be the one that makes the machine.

When you have a job, each day you will have to get up and get to that job. Then spend much of the day doing that job. That's my way of saying - you have to choose a job that interests you, excites you, challenges you so that when you get up and go to that job, you are doing it because you want to, not because you have to.

As for your family - most likely they will say something along the lines of "as long as you are happy". At least I certainly hope so.

Looking at the other responses below, I see many are saying essentially the same thing, so really have nothing new to add. Just more affirmation to be true to yourself and what interests you.

Is there anywhere you could get career advice from a professional? It sounds as if you might need to improve your qualifications, but the hard work would be worth it if you can then do a job you really like.

Do whatever You!!! want, no matter when it is you figure that part out.

Go for change. Much easier to do while you are still young. What are your areas of interest?

CNA is slave work. I know with my own experience. The best position for an introvert is lab work. . and could still be in the medical field if your family is skeptical. An AA in science will get you there. And if you are still happy with lab work (a position that makes you disappear), you'll stay there contented as a true introvert.

Is it really that important what your family thinks? I realized years ago I could never make some people in my family ever happy with what I did. Do what makes you happy, that is what is important

It's your life and you can do what you want!
With apologizes to Eric Burdon and The Animals

It is your life. Go and do what you want with it. Find something you love to do (a good salary wouldn’t hurt)?