My android tablet won't restore. Now what? - Android Q&A, Help & Troubleshooting

tools that i do/dont have: i do have a micro sd card. a rooted android phone. i dont have a pc. limited information on the tablet's kernel specs. etc. is a hyd t906 android 7.0 MT6592, 4.4 version of android something. mediatek operating system or whichever. i bought it on ebay from hong kong.
all the tablet does when booting up will show the "android" logo, that will flash before the before screen eventually stays on black, while nothing else will happen. i try to a factory reset, but even after the data has been wiped, is just does the same as before when i goto reboot. it became stuck like this after i searched how to remove the "no sim card found" notification every time the tablet powers on and goes to the home screen. the person said to download buildeditor app, and to add a line of code. when i rebooted to see if it works, i ran into this new issue. ive even tried deleting the cache throughout any attempt. it was rooted fyi, with kingroot.
if you guys could just tell me what like rom to put onto my micro sd card, including a link to the download, ill be able to handle the rest, if supposing i would just select that rom to "restore user data" in the volume up/power button screen would be correct.
Thank you in advance.
Brand : Unbranded/Generic
Processor Speed : 2GHz
Operating System: Android 7.0.X Marshmallow
Carrie : Unlocked
Resolution : 2560*1600
Internet Connectivity : Wi-Fi + 4G
RAM : 4GB
Hardware Connectivity : Bluetooth, Micro-USB, Wi-Fi
Type : Tablet
Screen Size : 10.1in.
Bundle Listing : No
MPN : Does Not Apply
Storage Capacity : 64GB
Processor : Octa Core
Features: Built-In Front Camera, Built-In Rear Camera, Color Screen, MP3 Player, Touc Screen, Web Browser
Network: Unlocked
Project Description
Main IC: Octa-Core MT6592, Dual Core Mali-400 GPU
Screen: 10.1 inch Capacitive Touc Screen 2560 * 1600
Memory: DDR3 4GB
Flash: 64GB
Storage Extend: 8GB-32GB Micro SD/TF Support
Network: Wi-Fi: Built-in Wi-Fi Module, IEEE 802.11 b/g/n.3G: Support external 3G Dongle.( WCDMA/ TD-SCDMA/ EVDO )
Camera: Rear 13 million pixels (with flash), front 5 million pixels
G-Sensor,Bluetooth: Support
OS: Google Android 7.0 Marshmallow
Battery: 5000 mAh (theoretical capacity)
OTG function: Support