If you jumper the connector at the accumulator, and nothing happens, adjusting the switch will not change anything.
There is a high pressure switch on the back of the compressor. If that switch is bad (or has a bad connection) it could cause your compressor to not kick on.
(Too much refrigerant will not cause the switch to trip. It isn't supposed to activate until it reaches several hundred lbs.)
I believe the high pressure switch is "normally closed". Too much pressure will cause it to open (switch off) and drop the signal to the compressor clutch.
...or you may just have a bad A/C relay. It's on the firewall, behind the driver, right next to the fuel pump relay. (I forget which is which.)
[This message has been edited by Raydar (edited 10-18-2020).]