I'm put off by the limited docs. I've read the Bevy book, only takes a few minutes, and just like that I'm out of resources to turn to when I get stuck.
When will the docs improve? I look at the release notes and ideally every one of those features would have several pages of docs. I understand that's a lot of work, and maybe things will have to stabilize before we get full docs?
Among Bevy contributors (including myself) there is a general hesitance to invest too much time in official learning material that will be obsolete by the next release. Bevy's APIs are beginning to stabilize ... and the appetite (both from users and from Bevy devs) for official material is increasing. The time is coming (soon)!
While you wait, there are a sizeable number of tutorials on YouTube, and we have learning material linked in https://bevyengine.org/assets/#learning as well.
Most pages are for version 0.11 or 0.12 already, and not much changed between the two versions besides the assets, if you already have a game written in 0.11. Together with the release notes, you'll survive :)
The cheat book is written for some smeared set of versions since it's inception. It is out of date for 0.11 as well. The effort to keep it up to date is somewhat low since Bevy changes so much an so often in its current development.
When will the docs improve? I look at the release notes and ideally every one of those features would have several pages of docs. I understand that's a lot of work, and maybe things will have to stabilize before we get full docs?