I installed Windows 10 yesterday on my desktop PC. I was running Windows 7 Ultimate and I must admit, that while it took some time, it went well. I was running a Windows 7 Aero Theme and in 10 it defaulted to high contrast which I immediately went in and changed. My desktop window looks exactly the same. I've started to personalize the start screen but I've kept it small. I tried out Edge and found it ok, but use my usual browsers for my usual internet sites.
I think Myr is probably right in that there is an awful lot of unnecessary angst over privacy settings. Anyone using a smart phone whether it's an iPhone or Android phone probably is already letting the world know more about them than they realize....