ESA Assessment

Hi, I am due to have my assessment on friday 14th December. I have numerous health issues but the ones that directly affect my ability to work are being electrosensitive which means i cannot be in any environment with wifi/mobile phones/computers etc. for very long without suffering debilitating symptoms. I also have nerve pain in my feet which means i cannot wear shoes that touch the tops or sides of my feet and can only wear flipflops. Also cannot be on my feet for too long without setting the pain off. I have other issues that cause a lot of pain and also narcolepsy. Now for the past 3 years i have been training and studying hypnotherapy which can be performed online ( i have a wired and shielded laptop ) and am now finally qualified. I have had amazing results with all the case studies i have done and really feel this is my calling. It suits my circumstances because i can do it from home. My plan was to start seeing paying clients next year with the hope of eventually coming of benefits or at least changing to a different benefit that supports people on low income. Do i explain all of this at my assessment ? I want to be honest but if they say i'm no longer entitled to ESA and i have to start going to appointments etc this will prevent me from doing what i have worked so hard towards. Any advice much appreciated.

Thank you Gordon, I have looked at the Permitted Work guide but haven't found the guide that helps you understand the assessment process. Sorry for repeating this in another post.

Well i have looked in every place possible and all i keep finding are the guides to filling out the forms for either mental or physical !
I found this :-
"We explain the enormous importance of how you travel to the medical.
We tell you what sort of questions you’ll be asked.
We explain the sort of unfair assumptions that can be made based on your answers and how to guard against them.
We tell you about the sort of observations the doctor may make before, during and after the medical.
We explain how the software the doctor uses works and show you screenshots of what the doctor is looking at on their computer."
This is what I'm looking for so where do i find this ? What is the guide with that information called ?
When i click on resources i get 404 page not found and the other pages i click on keep asking me to buy membership to access info even though i am obviously signed in !