The reality is that most fine artists need to have two jobs, a "day job" to pay the bills, and then their "real" job of making their art. Sometimes these "day jobs" are art-related, and sometimes not. For example you might get a day job painting baby furniture for a company, (a job I once applied for but did not take). I have a cousin who went to art school and studied textile art, and her "day" job was creating cloth labels for clothing company (someone has to do it, and it was quite complicated and satisfying for her). Some fine artist work in graphic design too, because they have the skills, if not the passion.
Many fine artists also teach, either at the university level, in public or private elementary, middle, or high schools, or in community art centers. To teach at the university level, you will need to get an MFA after college. These jobs are quite competitive and will require you keep up a body of artwork for exhibitions. I taught in public school, at the middle school level, which requires a certificate in K-12 art education, along with degrees in art education at the bachelors or masters level, depending on the school district. Community art centers usually have a requirement that you must show you are competent in an art form, usually by showing your portfolio. Teaching salaries vary, but my experience teaching middle school was that I made a comfortable living with health and retirement benefits.
As a retired art teacher, I will say that it was great being able to share my passion for art with my students on a daily basis, and I loved having the summers off to pursue my art. However, during the rest of the year, it was a challenge finding the energy to keep up with my art, but I managed to do so, often by taking art classes in the evening, which were necessary to keep up with my teaching certification, but also very stimulating in terms of my artistic development. I'm retired now, and I can work on my art full time, and it is wonderful.
I hope this has been helpful. Best wishes. Keep up with your art.