Without the extra navigation keys, moving around on a Mac can be confusing ... UNTIL you get used to the Mac keyboard shortcuts. Here's a link to the list of shortcuts, to speed you on the way:
Mac keyboard shortcuts - Apple Support
Like some others here, I made the switch about 15 years ago and have never looked back. I suspect you will also be pleased. The biggest difference is that Windows lets you modify anything and everything, which makes it more complicated to do anything. Mac OS just works, simple and straightforward.