Can anyone explain step by step how one would set limit sell orders of ETH for USDC/USDT/DAI on a DEX?

I have my ETH on a Ledger wallet. I want to set limit sell orders to convert to a stable coin. How does one do that?

From the basic research I did on 1Inch, it seems to only work with WETH? So, do I have to convert my ETH into WETH first to do this? Is that right? What are things one should know before setting limit transactions? Are they considerably more expensive than regular swaps or transactions? Are there any inherant risks involved? What does it cost to change or cancel them later?