Underestimate

My biggest weakness is just jumping in and not even estimating that hard, I'm usually a "can do" guy.

I think that gravitates to overestimation a bit.

I don't estimate myself at all, I just...go...do...whatever is needed...it works or it doesn't

Underestimate maybe.

Problem is: I do not always want to do what I can do or what I think I cannot.

It swings between the one and the other. When things are going good for a while and i get positive feedback I tend to think im a genius. Then i do some stupid mistakes and am convinced that im actually dumb af