Is my brain just f*cking with me?

I have the thought, this is happening!! I really believe this is happening; my business is growing, clients are coming and I am becoming an amazing and successful coach.
The question than become, what do I do as I prepare for my clients and business that is happening? And my brain said continue doing what you are doing and becoming the best coach you can be.

Then tons of fear, because of the thought, I will be too prepared for them.
Is there such a thing as over prepared?
Iā€™m a constant work in progress, but could I be too prepared for the clients I have coming and that be a turn off?
Or is it my brain f*cking with me to keep me in my comfort zone?

Any questions I can use to understand deeper?
Thank you 🙏🏽