The easiest way to get anything done that's been difficult to do or difficult to bring about is to start.
You start very small. Maybe you do a little research on the web. Maybe you sit down with pen and paper and do a mind map; you write all ideas you have about this project.
When you do this, new ideas will come to you. You may stumble upon new support, new information, new direction . . . that will inspire you, and you will move with energy and clarity.
The reason with sometimes can get done what's important for us to do, or can't make happen that big something that we want is because we think of it in large terms. Braking it down in small doable activities opens up for a way we can take specific action to get the ball rolling.
Just writing it down and brainstorming will do a lot to move the project toward actualization in matter.
The main thing is that when you want something, any action, regardless of how small, you take in that direction, including just writing down ideas, will start to build energy. You will get more ideas. Once you get more ideas, you take further action. This builds momentum.
The main thing is to start.
I talk about this in my little book The Workings of Energy in the Human Energy Field. It's such an important topic. Most of my clients believe they're stuck, when in reality they're not taking the first simple action. And that's very easy to do once you know the action can be simple and small, something like writing it down on a piece of paper.
David Allan talks about this in great detail in his book, Getting Things Done.
So, start. Start with the smallest action you can think of, and pretty soon you'll be zooming along toward getting that which you want, or completing something you've been meaning to complete in a long time.