I was goin to buy a nvidia GTX 970 gaming 4gb is that enough and also could you answer to my previous question:
"I'm sorry I sound stupid I am trying to get started with gaming computers, so you are telling me I buy the AMD FX 8350 and the motherboard and replace the APU by them?"
Yes, you will replace APU with new mobo and CPU.
If you plan to do those all upgrades i suggest you switch to Intel since it offers much better performance than AMD atm.
Something like i5 6500 16 or 8 GB of DDR4 RAM b150 motherboard and GTX 970 will be much better than FX 8350.
You can link me here shop from where you want to buy your parts and budget and i can pick you stuff for that.