New things are always scary. Waiting to feel comfortable before you start is an impossible situation; it's what creates "stuckness."
To feel comfortable, you have to start.
Only in being in the energy of the project will you begin to create comfort.
In the beginning, you may not be able to do much. It will feel disorienting. Of course, scary. But the important thing is to do something, and keep coming back to it. Consistency.
It will feel rough in the beginning, but with repeated effort, things smooth out. In other words, enough energy is built up in the direction you are going so you will not feel strangely disoriented in your own project. The new energy having "taken" it creates a different context for fear, and you can ride it out.
So, when you are afraid to start a project, start it anyway. You don't have to do a lot. Do little. The main thing is to start it. The more you come back to it, even with tiny advances, the easier it will get.