Achieving my goal

I want to start doing something in order to achieve my goal, but I am postponing it. Because 1. I’m scared of failure 2. I’m thinking it’s too much work 3. I’m afraid that I’m going to start and will have to stop again because of my health (like last time).
I know it doesn’t make sense and worries are useless… and I know I can do it. And it’s ok if I fail, and it’s ok if I have to stop and take care of my health. I should just do it. But I am still not doing it.