Learning path
From your first command to filtering, sorting and your own function, with a cheat sheet and two tested scripts along the way.
This path takes you from never having opened PowerShell to writing a small function of your own. Most steps are Shell Lab exercises, so you type real commands in a console in your browser, and each one ticks itself off when you solve it.
Keep the cheat sheet open in another tab. Nobody remembers every parameter; good admins know where to look.
Commands are a verb and a noun. Start with the simplest one.
Get-Help is the habit that makes everything else easier.
The pipeline passes objects, not text. This is the idea that makes PowerShell different.
Where-Object is how you ask for exactly the rows you want.
Everything you have practised so far, used on a job you will actually have.
Your first function. After this, you are scripting.