You are in the right place. This article will explain why Android 6.0 (Marshmallow) is the "sweet spot" for this tablet, which custom ROMs actually work, and how to install a version than the stock firmware.
: Most tutorials for this model use a "temporary TWRP" or recovery file to flash the ROM without permanently modifying the bootloader . rom android 60 para tablet canaima tr10rs1 better