And since the original post is “Best Programs”
Search using the term software instead of program.
The most common are Affinity Design, Corel Draw, Illustrator, and Inkscape, While some folks use 3D design programs like Fusion 360, almost everyone here uses one of these four programs.
It is a a challenge, but well worth it. I had familiarity with Inkscape, but had to learn how to design specifically for the laser. Then I wanted to learn a 3D design program, for designing things with the Glowforge but most importantly for designing for a 3D printer. I had tried numerous times to figure out how to start on Fusion 360. But then I tried OnShape and it clicked for me. Spent a long weekend learning how to do an object that was a simple shelf with three parts, but it was so worth it.
Lots of video tutorials and how tos.