Imagine starting work on these things right now and notice how you feel. Investigate from there.
Or, ignore the feeling, and go work on your dreams anyway :)
Best wishes
Also, an important thing to realize is that everyone is bad at stuff in the beginning. In the words of Jake the Dog, "Suckin at something is the first step towards being sorta good at something!"
Or (can't remember where i got this) "Every artist has 10,000 shitty drawings in them, it's best to get them out as quickly as possible."
Deliberately making something bad (because it will probably end up sorta bad at first, whether you want it or not) can help you overcome the delusion of "it has to be perfect or people will judge me!"
Aim to fail because failure is an essential part to success. You keep sucking until one day you wake up and realize things are going really well. You have to make it to that day though. The only real failure is giving up.