I'm too tired.
I don't have time.
I'll start tomorrow.
It's too hard.
I'm not ready.
I'm scared of failing.
I don't have the resources.
It's not the right time.
I have other priorities.
I'm not good enough.
I don't know how.
I'm waiting for inspiration.
I'm too old.
I'm too young.
I don't have support.
It's not perfect yet.
I'm not sure it'll work.
I've tried before.
I don't want to be judged.
It's too risky.