Actually, before jumping into too many projects just sit down and play with the Glowforge. Check out how it engraves, check out scoring and note the differences.
After running a few canned jobs (I liked the phone stands that @smcgathyfay designed) and give those a try. It took me a couple tries to get everything right (don’t engrave the curly-cues, score them!)
That and catalog stuff will get you thru the first day. Try the scanning, it works great!
Then start pushing a bunch of your own (and other people’s stuff) through the machine. You’ll have a much better idea what to expect and I think will get up to speed much faster. There is a lot to take in, even after having read the forums from top to bottom 