A couple of hours’ study per flight?......I think you are probably doing more than most.
I was an engineer before being a pilot, so I find technical stuff interesting and easy to assimilate.
But don’t overthink this, You do not need to know every bolt and joint. You need to know what to do if the system stops working.
More specifically, you need to know your memory drills. Then your ECAM actions and drills - which will be displayed for you to follow - read and do. Then you have the STATUS page followed by QRH, and the computer reset table, and the summaries for double hydraulic failure, emergency electric configuration etc.
Above all: FLY - pitch, power, attitude. Navigate - MSA?, where are the nearest airports?, Communicate - work through ECAM and talk to cabin crew and ATC. Then get PM to sort the problem.