Where can i find a cute handbag for school!?

so i am going to be a freshmen in high school and want a really cute bag for all my stuff! i want it to be a big bag that has smaller handles but also a larger strap too! i will have a smaller purse for personal items so i don't want it to be too big for me to carry around. i want it to be cheap but still look nice! thanks for the help!(: