How to swap stETH for ETH on Ledger?

Could you please explain, in a straightforward manner, how I can go about swapping my stETH for ETH on the Ledger platform? I'm a bit unfamiliar with the process and would appreciate a step-by-step guide. Are there any specific requirements or prerequisites that I need to fulfill before initiating the swap? Also, could you clarify any associated fees or charges that I might need to be aware of? Lastly, is the process secure and reliable, and can I trust the Ledger platform for such transactions? Thank you for your assistance in this matter.