Hi, @master666. :4227bearpumpkin2: To start creating your own map, you need to fill out the Creator Application Form first. You can fill out the Creator Application Form by pressing the button. Selected players will receive an in-game mail within 30 business days of submission.
Note: You will not receive an invitation code by filling out the in-game Creator Application Form. If you get selected, then the button will appear on your screen.