"I'm hoping to acquire the tools I need to help me perform at my full potential"

I have decided to take this quest because I'm on a course of self improvement. Though I have overcame many obstacles throughout my life, I am constantly doubting my abilities. I feel I lost so much time and become discouraged about what I am capable of achieving from here . I'm hoping to acquire the tools I need to help me perform at my full potential. My biggest obstacle is my memory or lack there of, I want to accomplish so much more but get very discouraged when I try to learn new material because my retention level a poor. I managed to get through school, but it came with great stress, frustration, insecurity. I just want to not be limited to getting no further than I have gotten.