I'm new at this I could really use some advice! (excuse my english)

Hey guys, I want to build myself a pc but i want to be well informed before I do so. What should I know before buying parts and what do you recommand? I wanna be able to play pretty much any games and I am willing to spend around 1000$ Thank you!

My friends build : https://ca.pcpartpicker.com/user/dvct97/saved/#view=y8vgXL

What do you think about it ?