Controversial opinion, instead of working another job get a AA in Business Administration (that is just what the degree is called it is not specific to being a business admin lol). Talk to your local community college and see if there are any local universities with a transfer agreement.

Community college isn't free, but is it very affordable and depending on your families current financial situation could be free after government grants, key word here is grant not loan. Grants, like FSEOG, Pell, and potentially any grants your state offers essentially cover the cost of tuition and potentially books.

Also, best case scenario: you enjoy what you are studying/learning about the business world, you knock it out of the park with your grades, and qualify for some merit based scholarship/grants. There are tons to help people transition from community college to a 4 year university.

At the end of the day, getting another job after already working 40 hours a week will get you money today but probably wont help you increase your future earnings.