any advice with minor laws?

i live in the state of maryland and just found out i'm 4 weeks pregnant. i am only 17 years old and currently not enrolled in school so i have nothing to do all day. my parents have offered to help provide for my child but i don't want any help because i got myself in this situation and plan on providing for my baby and myself. i have a second interview at panera tomorrow and i believe i'm only allowed to work 25 - 30 hours per week and i don't think that's enough for me. i really want to work as many hours as possible now that i'm very early in pregnancy so i don't have much to worry about once i leave for maternity leave. i do turn 18 in the month of may. any advice on what i could do? thanks!