You have 1 month to go back to Windows 7 or Windows 8.1 after installing Windows 10. So make sure you make up your mind before the option disappears. If you have a Toshiba laptop then for the love of sanity wait to upgrade it (lots of random issues currently)
What do you mean monitor your activity?
I am upgrading my Nokia Lumia Windows phone to Windows 10 for phones next week.... I should make a video.
Here is a great informational video on Windows 10 and what to expect https://www.youtube.com/watch?v=uRs4hz1YEQc#t=59