Searching “invest $10[0]k into USA index funds low fees”, the Vanguard funds that come up! (Vanguard sounds a little special, maybe they do good marketing. Ah, per Wiki: “Vanguard is owned by the funds managed by the company and is therefore owned by its customers.”)

Looking familiar: VTI or VOO, VTSAX or VFIAX

you might consider VXUS for int'l / hardware exposure (20-40% of total)