Is this a good plan?

I’m rebuilding after losing my savings through trading. I’m working part-time, still behind financially, and my mom is helping with part of my rent. Thanks to that support, I’ve saved about $900 in the last two months. My plan is to hit $1,000 for an emergency fund and then start investing $100–$200/month into VOO. Would you start investing at that point, or keep building the emergency fund first?