YSF: First of all there isn't a great deal of "technical" stuff to read and remember on how your radio is supposed to work.
I know that many radios have switches and knobs up the wazzoo but that still shouldn't be a problem. Tuning the transmitter part for proper operation isn't all that "technical" either.
Your retention problem caused by whatever is just something that you need to work around and getting inside of the transceiver or the power supply shouldn't be necessary.
I also suffer retention problems and until I was 18 years old simply thought I was stupid....sometimes I thought border line retarded. However, once I learned that I wasn't either I took steps to compensate.
Let me suggest a few things, based on my personal experiences. With many of us with this "problem" there is a tendency to panic when confronted with a piece of gear that appears
complicated. Also there is a tendency to panic when confronted with an operating manual that is often very extensive and detailed.
My suggestion is to take the manual and jump to the part where you hook up an antenna and do it. From then on just familiarsize yourself with each control by the description in the manual. Stay in the receive mode until your comfortable using it.
Before trying to transmit with it, read and reread the tune up instructions until you can comfortably do that. Stay away from external gear like antenna tuners, just tuning into a dummy load. That way you have nothing to complicate things for you. All transceivers are designed to operatin into a 50 ohm dummy load without any external gear.
If it doesn't work doing this, get some help. Don't complicate things by making adjustments inside the box or the power supply. There's nothing more disconcerting for someone trying to help you but first having to listen to all the things you screwed up or down that you shouldn't have.
OK, so you have a health and med problem. You know this. Don't let it be a crutch or a major hindrance to you. Work with it or around it. Sometimes it's very difficult but if you want to do .....whatever.... you will have to do it. Or you can give up and sell the damn thing.