Hello all, I'm super new to the PC building world. I was gifted a prebuilt PC back in I think 2014 or 15 and I now can afford to upgrade my PC I just don't know where to start. I'm wanting to build it around gaming. It runs some games decently, but games like No Mans Sky it won't even load the start screen. I know that it is most likely because I have a GTX 460 in it now. I'm just wanting to know what are some good and reasonably priced upgrades I can make. (Also this is my first Reddit post ever so if I messed up please leave feedback)

[EDIT] I want to try to spend around 500 or less per part. SPECS: CPU: AMD FX(tm)-6300 Six-Core Processor 3500 Mhz, 16 gigs of RAM, GPU: NVIDIA GeForce GTX 460, BaseBoard: MSI 760GMA-P34(FX)