To edit the spacing between your website sections, click on Edit Section Image & Spacing from the right hand pop-up menu in your Website Editor.
Choose the “Spacing” tab and adjust the image padding by moving the blue dots along the scroll bars.
Here's a quick video: https://www.loom.com/share/dd0ca7750d104738ae3c3fbad3693962
To reduce the spacing between sections, you will need to change the bottom padding from the first section and the top padding from the second section.