Learning curves are always dependent on the participants. I used to have a little sewing school. We had teens who made and sold their first quilts. We found a demand right away- summertime, touristy town, beach quilts that were fun to make so they made them in a few hours, an available long arm, simple quilting and they sold like hot cakes.
First, sit down with the machine and hopefully the the owners manual thread and some plain fabric. Learn the machine. Try out different stitches, techniques described in the manual and see if you enjoy the process.
Success is dependent on your enjoyment- desire to do it.
Then put together a simple patchwork quilt, maybe something you could use as a car quilt or picnic quilt. Start to finish - still enjoying the process? If so, jump in. Look around, see where there might be a demand...I don't know where you are but ( cowboy) seems like maybe western themes might be desired, or, going to college, dorm quilts are always in demand.
Do you have time to dedicate? After school, homework, family time. Do you have the discipline to spend ( down time) creating, instead of watching tv or veging out?
People ask my husband how it is I work full time, plus a second part time job and still create good, home cooked from scratch meals, keep up with the house and make many great quilts?...
he tells them I am always busy. I never just sit & do nothing. If I'm awake I'm doing something. Time management is important, organization is important, the desire is most important. Only you can answer your question.