Hello Pamela,
And welcome to TSG (TechSupportGuy - and gals of course).
We all began, just as you are doing, wanting to know as much as we could in as short a time as possible.
For some of us learning can be frustrating to begin with but over time, and with help, we actually learn the most important thing - which is the process never ends.
After four years on-line I have to say I cannot answer your first question but somebody will. In fact I cannot answer any of your questions.
Again somebody will.
Best wishes.