[Q] funtab pro topic

I have a funtab pro. With a ice cream sandwich 4.0.4. With a kernel 3.0.8 root@ubuntu #162. I I don't think bootloader has been trouch. I would like change to over to a jelly bean or kit kit which ever is better of the two. But I am not that smart plus all have is a tablet and droid razor. So whoever help me has to go into detail. Or if I can't get that,maybe help me Google play on it. I have amazon play store and it sucks. Everytime I put anything on it come used unfortunately ,something has stop working. I am tried of see that error. Please help. Remember real detail instruction on which ever you think is best.