^ There is a blog post from Coinbase pro on how to stop-loss and limit orders, https://help.coinbase.com/en/pro/trading-and-funding/orders/overview-of-order-types-and-settings-stop-limit-market. But this is very crucial if you are a newbie that did not understand. First, you need to understand and how to execute this in the Coinbase pro in the market. Nevertheless, I wonder why you choose this Coinbase for your trading, there are too many good exchanges out there, like Binance and Poloniex they had a stop-loss learning webpage.
https://support.poloniex.com/hc/en-us/articles/360040029993-Stop-Limit-Orders-Explained
https://academy.binance.com/tutorials/what-is-a-stop-limit-order