Start again
Start small, start now is always better than start big, start later.
Maybe you already started. You've done a project. You've taken a class. Then the hard part is going slow and steady. Steady is the most challenging of the two. Taking baby steps every day is a special undertaking.
The most difficult part of moving steadily is confronting how easy it is to stop after a setback. The best way to move forward is to start again.