When in doubt, do.
When we dream and visualize, the more logical (and scared) side of our brain will often try to keep us from going through with things that are uncertain. The logical side of the brain is too concerned with facts and theories on whether things have and/or will work out or not. It will try to keep you from doing things by coming up with sometimes logical and sometimes non-logical theories and explanations to the dreams that the other half of your brain is dying to fulfill.
But the real fact is that we cannot know anything for sure until we try it. You can never know if something will work out, merely by thinking about it. Action is the only thing that can remove any doubts you might have. Action is the only thing that will take you somewhere. And action is really the only thing we were born for.
It is easy to sit back and be comfortable, but when you get comfortable you also miss out on the things that could have happened if you just gave it a try. So always act upon a dream, an impulse, or a feeling. Rather do too much than not enough, to prevent yourself from regretting not to at least have tried. Who knows, trying something out might actually take you where you always wanted to go…