Even advanced users run into problems. Here is how to solve the top-reported issues on XDA.
Note: If you boot back into the normal Android system first, the device may overwrite TWRP with the stock recovery, requiring you to flash it again. Download Sources twrp36090n8000imgtar top
Now go ahead and flash that recovery. Your 2012 tablet is about to become a 2025 productivity machine. Even advanced users run into problems