mobile

Hi! I wanna upgrade to cyanagen mod but my device is not on the supported device list. And i dont wanna brick my device. I want to back up but i cant figure out how to use any backup/recovery programs at all! (Yes i have tried Titanium backup. didnt understand it) What i want is that if i dont like my current ROM or i get stuck in a boot loop or a virus etc. I can restore my device to a previous stand point with everything intact so i dont make the same mistake again. Yes i have tried CWM and TWRP but i just get .IMG files and idk what to do with them. I want a program that will give me a step by step guide on how to back up my data and how to restore. no .IMG files please unless you can tell me how to use them properly.

Device details:

Rooted: Yes

Acer icona tab 8 A-840FHD 4.4.4 KitKat. If you need any more data i can pull up pictures of more info. Thanks for helping! :)