what makes you believe in your skills? ?

A history of past success.

My salary.            

Like Glenda -I make a good living off my skills. People want to buy my stuff.

The fact that I make 6-figures a year makes me believe.

Ya I'm going to try to take physics 1 and go back science stuff etc . That is the best etc try take physics 1 course 

seeing the finished products and knowing that's  quality work. 

I've done many jobs in my life, where many people said it couldn't be done or was too hard, or downright impossible. 

I have the talent to IGNORE such idiots.......study the problem, and then proceed to show them why I get the Big Bucks, and get the job done........safely, and  done well. 

Because I have 3 skills most don't have.......persistence, ingenuity, and a way of seeing things most can't. 

and the skills and talent to actually do the work required. 

Confidence................