Also a lifelong Windows user, but have to use a Mac for work as of last year. I was expecting it to be a nightmare, but honestly 99% of the day to day stuff is either identical or similar enough that you can figure it out in a minute or two at most.

Things get a bit trickier if you’re trying to do more complex power user type stuff, since there are different paradigms at play, but even then a quick search will easily point you in the right direction.