I’m glad to see that you’ve already received some great information on this topic from our other community members. Thanks folks!
In case it helps, I recommend checking out the 2D Software Matrix located at the bottom of Dan’s post here: https://community.glowforge.com/t/community-glowforge-tutorials-table-of-contents/
The matrix contains links to many handy tutorials about creating designs in various 2D programs, including Illustrator. Please let me know if this helps you get started!