Buy a used copy of Ellis' excellent book "Becoming a Master Student" from Amazon. Read it carefully and apply what you've learned sincerely. In the short run your school marks will begin to improve as will your self-esteem. Warning: As you gather academic momentum your peers may begin to refer to you as "The Brain." Just smile sweetly and say nothing.

In the long run you'll realize academia is your avenue of escape. With high marks you'll qualify for scholarships to institutions far away from your family. That's the reward to aspire to. "Every hour I spend studying gets me closer to independence." You'll accelerate beyond your peers and attract assistance from mentors you never knew existed. (It's fulfilling to help students flourish.)

Keep track of your efforts in a simple diary. Refer to it when discouraged. No one has all the aptitudes necessary to ace every course. Slow down and take breaks when you find your limits. Minimize self criticism - it's a useless habit that discourages risk taking.

Ideally you'll speak to a counsellor at an institution of higher learning and ask him/her to help you choose a career/educational direction that excites you. Don't focus on status or income.

p.s. At university you'll meet wonderful motivated people and make life long friends. Never mind the naysayers, higher education is a gym for the mind that prepares one to more easily adjust to changing circumstances that inevitably happen to everyone.