Hey madda - i found this to be very helpfull getting some knowledge about the settings.
profile for ender 3:
http://www.emcu.eu/configure-ultimaker-cura-software-for-use-the-creality-3d-printer-model-ender-3/
Turtorial Cura:
https://all3dp.com/1/cura-tutorial-s...licer-cura-3d/