PC Newbie needing help!

Hello! I’m looking at getting a prebuilt PC but I’m a complete newbie and have no idea where to even start looking or what to look for. I don’t have anyone in my life who’s super PC savvy so this is completely new territory for me.

I’ll be using the PC to game (most games like Fortnite, Phasmophobia, Lethal Company etc.) and to also stream.

Can someone please help with where to start?