The point is that you shouldn't try to do something, you should do it, i.e., you "span" a desire in your soul and you go along the feeling, the "thinking" is just for control, not substance... at first you will litteraly be bugged by thoughts like "i'm not good enogh for this" etc... aknowledge the existence of those thoughts, and then throw them away.
Yours is a post about bad self-fulfilling prophecies.
It's not really a matter of intelligence for the most part, it's only a matter of experience.
PS.: oh, and AFTER you got rid of the bad self-fulfilling prophecies, you could try to create some good ones :)
Good luck, you are going to need it