How does someone build wealth who has little to begin with? I have little to no savings, I plan to start investing with as little as possible but wondering whether this is the right move

Yes, this is a right step in the right direction

There are platforms which allow minimal amount, do a safer investment like S&P500

If you are young, relatively healthy and without much "bagagge", seek to increase your income potential. Save and invest at the same time.

Personally, my advice would be to set up an emergency fund first before going into investments. This is because investment is risky, and with an emergency fund, it acts as a safety net for you.

You can try this emergency fund calculator to see how much you should have first. I’m not sure if you are new to investing, but here’s a beginner’s guide that I think could be helpful!