I have a rockchip generic 7" tablet 2012 running 4.1.1 I want to upgrade for pokemon go

[AC Question]

Model Number: Tablet PC
Android Version: 4.1.1
Kernel Version:
3.0.8+
lsd@zed-server3 #70
SMP PREEMPT Sat Nov 3 14:48:22 CST 2012

I'm a total newb but I have been looking all morning and I just can't find out what to do. Please have some sympathy.