This was sent to me because I've had 3 bad PCs and the belief is the Mac platform overall is more stable for productivity. Guess we'll see.
They're just tools to get work done, I doubt you are going to be more productive in the Mac immediately. I'm far more productive on a Mac because there is a lot less friction and irritation for me. I use Mac/Windows/Linux daily.
'command' is the name of the key on either side of the spacebar, also called 'splat', and abbreviated as 'cmd' or ⌘. Many keyboard shortcuts you are familiar with in Windows that used control are the same on the Mac, but with cmd instead of ctrl. Keyboard shortcuts are shown in the menu, ctrl is ^, shift is ⇧, and option is ⌥. Searching for something in the help menu will show you matching menu items and how to find them even if nested.
There are some fundamental idiomatic differences between Mac and Windows that go back 30+ years that will be the biggest friction points for you. From very small ("'home' and 'end' don't work right!") to the menubar being at the top of the screen to cmd-tab not working like alt-tab. At some point you may try to 'cut' some files to move them from point A to B and discover you can't (you copy and then move them instead of pasting them).
Mission Control is way faster than cmd-tab for getting at what you want if you have lots of applications and document/windows open. You can invoke it with keyboard/touchbar, trackpad gestures, and you can bind mouse buttons to it (have used a 5 button mouse for 15+ years for this). See the Mission Control and Trackpad ("more gestures") system preferences to set these. e.g. on the MacBook Air I'm using right now, I swipe down with four fingers to see all the windows of the current application and I just hit tab to cycle through the apps.
Drag and drop is a pervasive UX idiom- you can drag content (a block of text, an image, etc) and files from one app to another, to/from the Finder, etc.
You can export 'print' to PDF from any Print dialog (cmd-p) in any application. Just hit the weird PDF button/menu at the bottom left of the Print dialog.
The built-in PDF viewer/editor, Preview, is very good so I would use it before getting Acrobat.
MS paint is better though.
Depends on what you need to do. I really wish there was a basic pixel art program on the Mac since that fundamental feature of MS Paint is totally absent from what comes on the Mac; for most other image/photo/PDF related tasks Preview is much more powerful.