I was a literature major as well. It is a legitimate concern to wonder about what sorts of jobs there are for your choice, which I believe you should keep because it seems to be passionate.

I did try journalism. It wasn't so bad. There is a growing market for creative non-fiction, which is more likely to pay than fiction or poetry. Memoirs and personal essays are very popular and in demand so it might be something to look into.

Sometimes other types of occupations look favorably on having this degree because they need people who can write and communicate effectively. So you might have to take a job outside of your interests to support yourself and do your writing as your vocation.

Teaching is frequently what people consider as the main option. In my experience teaching requires a whole other set of skills that are not related to writing. Teaching writing on the other hand can be done outside of an institution. There are many poets where I live who support themselves by running workshops and critique groups. They probably can't do this completely (meaning they have help from partners or something), but they do manage to do writing as their main focus so it is possible. Good luck.