If I can be honest, a long, drawn-out article about your power will not put it any better than that quote by Tim Armstrong (from the track The 11th Hour off "...And Out Come The Wolves").
[caption id="attachment_3201" align="alignright" width="300" caption="The Power To Choose, The Power To Change"][/caption]
"Do you know where the power lies? It starts and ends with you." - Tim Armstrong
It's such a strong and succinct point.
You have the power to make anything happen. If you don't believe this is true the problem stems from the fact that you're too far in your head and lacking confidence. You're not giving yourself enough credit or you're making excuses.
Any answer to any question you have is available to you.
Maybe you're in the position of not knowing what you don't know. We all find ourselves in this position at one time or another.
If you don't know where to start, start at what you think is a good place to start. There is absolutely nothing wrong with making a bit of a guess.
If you don't start you give up your power.
What are you gonna do about it?