Hi Hbarna07
I am Dave, I will help you with this.
Rest assured, if you use the Upgrade Assistant or update through the Settings App, the upgrade to 11 is painless, it will not affect your personal files, settings or installed software, you do not need to worry about that.
However, as always, you should have a backup of your personal files, whether you are upgrading or not, one copy of your files is never enough.