You have to wait for the semi-regular “stable update” post, check the major issues and act accordingly.
You don’t have to wait for them, you can update without it. The vast majority of issues in those posts are caused by the upstream packages not by Manjaro. If you use one of those packages and if an update brings a problem and if you’re affected by it you can read the latest post to see if there’s a readily available solution that someone in the Manjaro community has already found. It’s a community service not a mandatory read.
This shouldn’t happen in a “beginner friendly” distro.
You have to keep in mind it’s still an Arch derivative. I said the most beginner-friendly among Arch distros, not the most beginner-friendly in the world. Arch is a bleeding-edge rolling-release distro. When you keep constantly updating tens of thousands of packages to their latest versions some of them will occasionally have bugs. It’s the price you pay for staying on the bleeding edge.
all other majors distros update without intervention.