VOO, QQQ, and NVIDA. Please help my portfolio.

I am a 22 yo college student. My portfolio is VOO,QQQ, and NVIDIA in a 60/30/10 split. I am new to investing and I am realizing this is basically investing in the same companies with little diversification. I am thinking on switching to VTI, SCHD, and NVIDIA. Any thoughts? Please help!