Registered Nurses Helppp..

so are any of you RN's? i want to know if the program was hard for you? what were your biggest challenges? im looking into being an RN, and will start taking the courses for it at my university. science was never my strongest subject, but i would love to be a nurse, ever since my baby was hospitalized, i wanted to be a nurse. i saw how the nurses cared for my baby, and that motivated me to become an RN. is this program super difficult? any tips you can give me please,,anything really.