Looking for Real-Time Data Sources and Collaboration Partner for Clay Experimentation

Real-time data sources - Does anyone have recommendations for APIs or data sources that update in real-time that work well with Clay? I'm open to any type of data (weather, stocks, social media, etc.) - just want to learn by doing.

Collaboration partner - Would love to connect with someone who's also learning or working with Clay. Happy to share learnings, troubleshoot together, or work on a small project.