VOO and ?? ( no chill pls )

Ok… I invested $5k into VOO through my Roth IRA at the end of 2024. What’s my next investment, something without overlap and maybe a little more risk?

I was looking into VB, ARKK, even SCHD. What do people think about these?

I am not interested in VXUS but still looking to diversify. I am 22 and looking to hold for at least the next 40 years.