I'm new to Magento (Version 2) and am a bit confused by the variables for the calls in the API-Documentation (https://magento.redoc.ly/). As you might know there's not much explanation about what they stand for or possible values besides the datatype. Until now I could construct most calls with the help of this and other forums, but am now stuck on the call to get orders based on certain criteria, e.g. "new" orders, orders from the last n days (What does searchCriteria[filterGroups][0][filters][0][field] mean? What could be possible values???). Since this probably won't be the last call causing me such headaches I was wondering if there might be a document I didn't find yet, where there are further explanations.
Thank you very much for your help!