Question looking to uprade my PC

only new parts I haven't installed is the new Ryzen 5 5600x CPU and
Lian Li GALAHAD AIO 360 RGB 69.17 CFM Liquid CPU Cooler

what else should i get to upgrade my budget pc?
Looks like it will be nicely balanced system but.....
That cooler is way overkill, 5600x can do just fine even with a mediocre air cooler and probably too expensive for a budget PC. Same for the case.
But, if you already have all parts make sure you upgrade BIOS to newest version or it won't work.