I endorse the Time Machine suggestion. Having lost a couple of weeks of files (fortunately nothing too significant; I was in the habit of backing up every month or so) when the HDD failed on my original 2005 Mac Mini, the coming of Time Machine was a significant factor in the decision to replace it rather than repair it in 2009.
Yes, it may take a little bit of time to adapt, coming from Windows, but OS X / MacOS is quite intuitive. A non tech minded colleague who still has Windows 7 on the computer he shares at home with his wife, struggles a bit with Windows 10 on the computers in our office. The office geek made a Hackintosh of one, and it works well. My colleague tried it, and took to it quite quickly, without realising that it was now effectively a Mac.
My own needs are fairly simple. The apps a Mac comes with are are adequate for me. I have Office for Mac installed, but seldom use it these days. Pages may not have all the features that Word has, but I find it easier to use. Likewise for Numbers and Keynote. Office files can be opened using the iWork equivalent, and exported as Word, Excel, and Powerpoint if necessary. For photography iPhoto (now Photos) is fine for me. They are not to everybody's taste, and you can install other apps if you prefer, or your needs are greater.
As to keyboard and mouse; it comes down to budget and preference. The wired Apple Keyboard suits me, but any keyboard will work. I like the Apple Magic Mouse, but not enough to cough up for one. I have long used a basic wired $8.00 Logitech mouse, which is fine for me.
In the end, various options are available. Be prepared to take a little time to sort out what is best for you.