How to exchange with Changelly?

Hello there! I'm curious about the process of exchanging cryptocurrencies using Changelly. Could you please walk me through the steps? I'm interested in understanding how to navigate the platform, select the right pair to exchange, and what fees or limits I should be aware of. Additionally, I'd like to know if there are any security measures in place to protect my funds during the transaction. Lastly, I'm wondering if Changelly supports a wide range of payment methods and cryptocurrencies. Thanks in advance for your help!