Honestly, it is disturbing the number of people who hone a few razors and declare themselves experts. I'm not saying this applies to you, but there is a glut of people who hone maybe six months if that and then declare themselves honemeisters. First, that term was coined affectionately for Lynn Abrams, and as far as I am concerned there is no other honemeister. Regardless of the term, no one becomes an expert that quickly. There is a reason that even modern trade apprenticeships last for a few years. Razor honing is not that complicated, but it does take a lot more experience than a lot of these recently minted "professional honers" think that it does.
In my opinion, it does not sound like you are ready to hone for others. I understand your desire to keep your beard, but you really cannot ever develop the proper expertise in honing if you are not willing/able test your edges on your face. That is the only way that you can get adequate feedback to be able to keep experimenting with and tweaking your edges. I do not believe that your arm can give you the proper feedback on your honing.