Tablet [Q] how can i install a custom rom on this tablet?

the specs are:
ARM Cortex a8 @1GHZ
512mb of RAM
4gb storage
Model:TWD_MID (nuclear_evb)
board:nuclear
hardware:sun5i

ive managed to root it using some generic drivers and i used kingo to root it.

how can i install a custom rom and make a custom recovery in case things go wrong? ive been searching for ages and cant find anything helpful as they usually refer to well known phone models etc

could you make it easy to understand as im pretty new to all of this thanks

i have attached an image of the tablet on amazon if it helps
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