Help with Model

Is doubt a feeling or a collection of thoughts?
Right now, I have so many doubts on whether I can accomplish my goal of 3k/month doing life coaching.
And the thoughts that I am having are:
I don’t know if I can do this or not.
I have never signed paying clients before.
I am not sure whether I can make this happen.
I don’t know if people are even going to pay me.
It feels like so much work.

So Is that a feeling of doubt?
I want to be in a space where I can believe that I can accomplish my goal as well as take action. Some part of me knows that I can achieve it, and some part of me thinks that I cannot do it.