HELP! advice and words of encouragement please?

im 19 and im really trying to get noticeably toned in 2 months... i HATE the way i look at the moment (my bum is the worst) and find it quite embarrassing which puts strain on my relationship. I really dont know how to do it though and although it sounds stupid, im scared nothings going to work for me. So if anyone has tried this and succeeded please let me know or if you have any words of encouragement... Thankyou xx