Lubuntu or anything that uses the LXDE desktop. Or stock Ubuntu with Unity isn't bad. Very easy (think Mac OS kinda...) check youtube, you'll seem some examples. Look for a guy called Quidsup and he does a lot of good reviews.
Good Luck!
A word of warning: Forget watching Netflix on Linux. Can't be done (easily anyhow.) Software installs are easy, but just do your homework and you'll get in the swing of it in no time. Also, a new version called 14.04 is coming out later this month. You can use version 12.04.4 and still get support for 2 more years, then your going to have to update it. In my experience Ubuntu 14.04 is a bit too demanding for older hardware and you should stick with 12.04.4 as long as possible (or Lubuntu 13.10, since it only gets 18 months of support, then you need to update it as well.)