20 and finally starting to invest. Is this a solid plan?

Yo, I'm 20 and finally getting my act together with investing. Planning to put in $50 a week and just leave it there for at least the next 10 years or so. And then maybe mess around with a few stocks but keep the majority of my money in this fund.

Thinking of doing this split: 60% in a US 500 fund, 30% in Total World, and 10% in Nasdaq 100.

I know there’s a lot of overlap there and it’s basically just a massive bet on US tech, but since I’m young I figure I can handle the volatility. Is this a decent way to start or am I overcomplicating things by not just sticking to one fund?

Any tips for someone just starting out would be huge. Cheers.