Fusion 360 has lots of neat stuff, but IMHO it's virtually impossible for a new user to figure it out.
It's pretty clear that Fusion 360 has abandoned traditional documentation, and the current strategy is to try to do everything with a combination of forum posts and Youtube videos.
The problem is that figuring out which posts and videos have the right information is extremely time-consuming. My suggestion is that you spend some time organizing the posts and videos - put together some kind of guide that points people to the valuable ones, tells people what's in each video, that kind of thing. ("Need to know about sketching? Watch these five videos, and read these 4 forum posts." That kind of thing.)
(FWIW, I think giving up on the doc was an unfortunate idea. At least for me, the way you're trying to get new users up to speed is failing badly.)