How can I use DigitalOcean for free?

I'm curious, how can I potentially utilize DigitalOcean's services without having to pay any fees? Is there a way to access their cloud platform for free, or are there any trials or promotions that I should be aware of? As someone looking to explore the world of cryptocurrency and finance, I'm particularly interested in how DigitalOcean might aid in my endeavors, and whether there's a cost-effective way to get started. Can you shed some light on this for me?