What is the best way to decide what you want to do with your life?

In my future I want happiness and I want money.
I want to wake up every morning and not dread generally what my day has to offer.
Yet I want to go home at night, knowing I can splurge on a little something here this week, a little something there.
I want to live with minimal to no debt.
I want to not live from paycheck to paycheck, as it is now for my mother and I.

I don’t want to make a mistake in the route I’m supposed to take to achieve this and I am deathly afraid and worry about my future constantly.
I know what makes me happy: art, people, music, interacting, creativity, writing.
I’m in college right now and started out as undeclared, switched to graphic design but something about graphic design just takes the fun out of the “art” in it.
I wanted that to be it, that to be my legitimate career that would bring this happiness+money thing but its not.

Now I don’t know what career will be.
There has never been a time in my life that my family and I have not been struggling financially. I just want to achieve financial security independently and even moreso for my family in the future when I get married, and have children because of knowing what it’s like versus what it could be like.

What in the hell is the best way to not be a failure and be happy like that?
Throw any advice, suggestions out there.
I’m just all ears.

And boy was that a yummy tangent!