19yo investor looking for some long term help

So I am a new young investor looking for some help. This would be for a long term investment (40+ years) From my research is going at something like 80% voo, 10% international (vxus etc.), and 10% small cap (avuv etc.) a good very basic long term approach? Or should I switch percentages?

I am just wondering if people have tried something similar and how it has worked? Or if I should switch small cap to something like QQQM? Any help is much appreciated