[jolux]

PowerShell is, in my opinion, quite discoverable and usable with a few commands to find your footing. I don't memorize a lot, because it's so well-structured and intuitive for the most part that once you get the basic structure it's easy to hack around with the docs.

Three commands that are useful to memorize, though, (particularly if you're having trouble remembering names) are Get-Command, Get-Alias (also with -Definition), and Get-Member. Get-Command gets you info about a command, like if it's an alias or not, and the path if it's a unix command. Get-Alias shows you all the active aliases, and Get-Alias -Definition shows you the active aliases for a given command. Get-Member shows you all the members of an object which can help you with Select-Object and Where-Object and so on.