Start Small
You don't have to do a lot to make a large impact. Let this serve as an example. Just get started.
Your Ideas Are Good Enough
You're waiting for external validation to tell you your idea is good enough. Don't wait. It's not coming. It will never come. Just get started.
Where You Are, With What You Have
The stars don't need to align. You can do a lot with what you have. Is it ideal? No. Sure, it's not going to be perfect, but it never could have been anyway. Just get started.
Stop Fantasizing
Don't let your fantasy rob you of the real work. The feelings of excitement and accomplishment should come at the end, not the beginning. Just get started.
Don't Overthink
You've spent too much time in self-doubt, when you know you can do this. Just get started.