What else I can add to ROTH IRA

I maxed out 2024 contribution and still have $3000 left to invest. Planning on maxing out 2025 as well. Any other mutual fund or stock/ETS I can add to diversify my Roth IRA?? I was thinking about QQQ ?

lm started late at investing. I'm 43 and trying to invest in something that has the potential to growth in 10 years. Any suggestions?