Hi! My brother gave me parts of his old pc and I need help

Below is what he gave me, I haven’t built a pc before so I’m just copying what he texted me.

“x570s tomahawk max wifi, 32gb of ram, montech air 903 max, 2tb wd sn850x, 5800x”

He said all I’d need is a gpu and psu and then I’d be good to go. I have no idea what I’m doing so if someone could help me out I’d appreciate it, I’d like to keep it around $300 if possible, TIA!