Where can I swap Ethereum?

Excuse me, I'm a bit new to the world of cryptocurrency and I'm wondering, "Where can I swap Ethereum?" I've heard about Ethereum and its potential, but I'm not sure how to actually exchange it for other digital currencies or even for fiat money. Could you please provide me with some guidance on the most reliable and secure platforms where I can safely swap my Ethereum? It's important for me to understand the process and the risks involved, so I can make an informed decision. Thank you for your help!