PC newb about to build... Help me out pls

Building a PC, complete newb...

Budget is 1200 for tower only, don't care about looks, if the hardware ran inside a cardboard box reliably and at the specs I want, I would not bat an eye.

Want to be able to run for example, elite dangerous in high-ultra on VR. SC on ultra, pretty much want to be able to run anything at close to highest settings. been reading about dual gpu's but im worried that most games won't be optimized for that type of setup.

This PC will only be used for gaming... pm me or reply here if you can help. Thanks