Have you checked the top "activator plate", of the mouse that activates the switch uppon depression of the mouse buttons? It sounds like the there may be a gouge in the "activator plate" which prevents the plate from making contact with the switch. If you do see this I used some hot glue and filled in the gouge on an MX master 3 and its been going strong for a few months now. But you can also use other fillers to get better results.
Why not instead just turn on the parental controls and have a consoler or friend/family set it up? What you are asking for is theoretically possible but but its like using a sledge hammer to nail in a screw. There is a better tool for your problem that can fix your issue as well as making it so you can actually sync your Tablet. Given that you already admitted you have a problem getting rid of the antenna wont help you as I can think of 2 ways you can potentially circumvent you getting rid of the antenna and then you are back at square 1. Answer: Use parental controls, onboard andrioid is good but there are other apps that can and will lock you out of nearly everything except at certain times, and what you specify.
Loose button, faulty board, a lot of different factors go into trying to pinpoint the problem. If it is a board problem swapping the board may be a solution but it could also be an issue with the physical button (that you press) not actually touching the button on the board. I would have to see inside to make a more informed answer.
This may help you: Settings>accessibility>Find whichever "accessibility setting" is turned on> Turn it off What exactly is your issue? Voice over? Screen magnification? Something else?
I cannot find any documentation that will prevent you from using 2 16gb sticks for 32gb of ram.... However... apple.... so if you find cheap sticks I would give it a shot worst it will do is yell at you.