A big promise on my offer

I am in the process of narrowing my niche and I’m on #4 of Narrowing Your Niche worksheet.

Here is my answer: “I teach you how to take your Biofield Tuning practice to the next level by giving you the tools to build a full-time practice in 6 months.”

Here is where I am struggling…

C: My offer
T: I may not be able to deliver on that promise
F: Hesitant
A: Don’t make the offer, drag my feet on starting my practice
R: I fail ahead of time and don’t even try to deliver

I could just go forward… How will I know if I can deliver? Just by trying? I’m afraid of disappointing people. Should I take someone through the program for free and see what happens? I don’t want to wait that long….