Some distros and technologies can be more complex.
For Home Assistant, consider using Yunohost. It doesn’t require Docker skills. You can find step-by-step guides on their website.
I guess gaming with Linux has always been tricky, you can check ProtonDB to see which games are easily compatible with Linux.
I also recommand Task.org app to sync tasks with CalDAV and I use raw Markdown files with WebDAV, both using the DAVx5 app for synchronization. For editing Markdown, I prefer minimalist apps that suit my needs. Right now, I find SimpleMarkdown (with disabled telemetry) to be the best choice.