Self esteem is what you want to think about yourself. So you are not good at fast comebacks or your fists, do you want to be? You could learn both of those if you wanted. But start where you are, do you make yourself laugh/like your sense of humor? Do you read a lot of fantasy, have a good imagination? We are all born with traits we can build on if we want. Figure out what you have inherited (natural interest or ability in certain subjects (math, music) good sense of direction, Interests vs. Aptitudes) and what interests you and figure out how to put those two together to enjoy what you are doing and achieve goals that please you. Pleasing yourself is self esteem.