Most of us manage just fine.
Go find a tutorial or ask questions, because that is what you will be doing with a Mac or Linux machine, despite the nonsense from people making it seem like it is fool proof.
As for Mac and Linux, I walked into a training class with a Linux machine about a month ago, never having working on it before. But since I had worked with UNIX boxes back in the '90s, I was able to get up and running in no time, and was creating programs doing serious number crunching. Yes, I did not exercise all of the new features, BUT THE OLD FEATURES WERE STILL THERE!