I can relate. When I have done the research and figured out a plan and know exactly the way I can approach it and am even excited to do it when I day dream about it...that’s when procrastination strikes. It has turned from a challenge into an easy task.
What usually happens though is when I finally start I realize there is a ton of stuff not clear and it becomes a nice challenge again without any easy obvious solution, and I regret my procrastination, and power on into flow.
The power of procrastination for side projects it’s absolutely amazing. It’s always this “if only I had more time I could finish all of it!”. But then when you have the time you become lazy.