What are the best resources to learn PowerShell 7?

Definitely consider reading 'PowerShell in a Month of Lunches.' It's an excellent book that I recommend to all new PowerShell users. It teaches foundational concepts with a lot of hands-on exercises to follow along. If you're using PowerShell 7 and need to handle JSON or use hashtables, those topics are really worth exploring.

One of the best ways to learn is to use PowerShell frequently, even if it’s not always the fastest option. Just like learning a language, you need to immerse yourself in it. I recommend checking out learn.microsoft, which has great documentation. Whenever you figure something out, save it as a .ps1 file to reuse later. Learning how to parameterize your scripts is also key—you can then create your own module library. And keep your scripts in a personal Git repo to ensure you have access to them when you switch jobs.

Learning by dissecting existing scripts is a great approach. It sounds like you learn similarly to me. Picking apart what's in existing scripts can help you weave in new knowledge with what you already know, expanding your skills along the way.

For those starting off, I suggest focusing on 'PowerShell in a Month of Lunches' and mastering the basics first. Learn to use the 'Get-Help' command and start writing simple scripts that can grow into more complex functions. Once you've built a few of these, you can create modules that interact with each other. It's all about incremental learning.