[Q] Stuck in bootloop, unsure where to begin topic

I have a Kindle P48WVB4 (Kindle Fire HD 7" 2013) that was my brother's, and now it is stuck in a bootloop. I believe it did this in the middle of an update. I have done some Google searching and learned that Kindle Fire Utility and Kindle Fire Unbrick Utility will not help with the 2013 model I have.

Does anyone know if there is any fixes available for this model yet?

[Q] Want CM11 but unsure Yoga 2 10 topic

I'm buying this tablet later today off of Lenovo's website, but I've looked at the custom ROM it comes with and I don't think I like it very much. I've noticed that there are no other ROM's available for this tablet so I want to try and port CyanogenMod .

I've never flashed a custom ROM before but I have rooted many devices many times. I was wondering if anyone has either ported an CM build for this device or if anyone knows if its very risky to port and flash my own build. Thanks in advanced!