Hi. I have a Samsung Galaxy Tab A6 with S-Pen (SM-P583) with China ROM latest (P583ZCS3CTJ1) that i just bought from a seller in carousell.
Originally, the tablet has been installed with LienageOs with Android 11 when i received it from the seller. It also has the google play.
Unfortunately, it lost the air command functions for S-pen. I can't also install samsung notes. I wish to have back the s-pen function back, so flashed back to stock china rom which doesn't have google play.
I'm already used to the air-command and s-pen features.

I've successfully flashed TWRP recovery (twrp-3.7.0_9-0-gtanotexlwifi-unofficial-20240221-b3-) with Odin 3.0.
I've also downloaded GApps (open_gapps-arm-8.1-pico-20220215).
The problem i've been having is i don't get how to copy or save the GApps zip file in the internal storage, thus i used sd card and otg drive to flash it in TWRP.
After flashing and rebooting, it stuck in the Samsung Logo and restarting.
What i did is go back to flash to the stock rom.

Anything that i might have done wrong? Or wrong files?

I hope to be able to maintain the original rom while having google services and google play.

Your opinion is very much appreciated.