weight/not confident

so my height is 5’1, i’m 15yrs old & i weigh about 147

my body has always stayed around thr weight of 145-149 and i cant lose weight for the life of me and i really want to. i’m not really confident in my body either so yeah. any tips on losing weight & becoming confident. and also for my height and age: is my weight fine or am i overweight? anything will help, thank you