How to use SushiSwap?

Hello there, I'm curious about SushiSwap and how to use it. Could you walk me through the process of trading on this decentralized exchange? Specifically, I'd like to know how to connect my wallet, select a trading pair, and execute a swap. Additionally, are there any fees associated with using SushiSwap, and how do they compare to other exchanges? Also, I've heard about liquidity pools and how they work on SushiSwap, could you explain that in simple terms? Thank you in advance for your help.