Which of those would you like?
: Download the "pico" or "nano" version for ARM / Android 7.1 from Open GApps to keep the system lightweight. Installation Overview download samsung tab 2 10.1 gt-p5100 android 7.1.2 firmware
You cannot install Android 7.1.2 using the stock recovery. You need TWRP (Team Win Recovery Project). Which of those would you like