What is the best way to allocate portfolio between QQQ, S&P 500 index,and individual stocks?

What is the best portfolio allocation between QQQ, S&P 500 index, and individual stocks?

I was thinking:

50% - S&P 500 index (VFIAX)

25% - QQQ

25% - individual stocks (NVDA, SHOP, FB, DIS, etc....)

Do you guys think this is good portfolio allocation strategy? Or how do you guys think I should allocate to be the most profitable? (Btw, i am long-term investor and I am young)

Thank you!