Todo lists can quickly become wishlists. The initial enthusiasm for a hobby turns into extremely unrealistic grand plans which then lead to disappointment when the lofty goals aren't met.

Try to keep your planning focus on now and next. What will you do today and what's the next step. Don't try to make a year step by step plan because the new knowledge you gain will inevitably change your original plan.

For me, ADHD was a huge part of my over planning problem. I knew I had issues finishing things, so I thought time management books and todolists would help. They did not. If you feel inhibited by your lack of focus and ability to do things then don't hesitate to get checked out by a professional.