I've mentioned this in other Powershell HN threads but you might want to try these two commands to make discoverability much better IMHO:

Set-PSReadLineKeyHandler -Key Tab -Function MenuComplete

Set-PSReadLineOption -ShowToolTips

Also note that you can get in-console help on most commands without having to go out to a web browser. On the ones I've tried, examples are also included which help output too.

Help will also list available commands; eg:

help json

Shows me the three commands available from my shell: ConvertFrom-Json, ConvertTo-Json and Test-Json.

There is also Get-Command, which you can filter for command discovery, ie:

Get-Command | where Name -Like "Json"

The advantage to PowerShell being object-based here is that if you press <TAB> after typing where, the list of completions you get will include the properties that are in the object returned as the result of Get-Command.

I also use Cmder for a much nicer console than cmd.exe. I haven't tried the latest version of the new Windows Terminal but I hear it's also nice.