1k-1.3k Budget USD

Hey guys, this is gonna be my first ever pc build I want it in black what would be your recommendations for a build I’m gonna use it for engineering, gaming, and my business I currently have. I also want it to be future proof with some white lights inside of it, I am also lucky enough to have a micro center 30 minutes away. Thanks any help is appreciated also should I be looking at Facebook marketplace for other parts?