Is there a free download I can use for Glowforge settings?
This might be a starting point for you. If you have a specific material in mind, use the search function for possible settings. https://docs.google.com/spreadsheets/d/1sWOebDU94HwezYPbHa3YdtXjpLbEl_vEPvCb1dSByL4/edit#gid=582951492
Also, learning how to test will save you major headaches: