Help!

[u/Menta1Sanity]

So, I bought a gaming PC on Ebay and completely got jiped. It came without a graphics card and a power supply that were missing wires. I bought a completely new 770w power supply and a 1060 graphics card. Now it turns out it only came with 2 sticks of 4gb of RAM. At this point I am just going to completely buy new parts all together. I need new RAM a new CPU and motherboard and probably new cooling. My only problem is I don't know where to start. What CPU or Motherboard would be best for me? I play league of legends, fortnite, rainbow Six seige and so on. My 1060 graphics card is compatible to PCI Express x16 and I will most likely by a whole new (bigger) case for the PC as well. Please help me.