Meaning no disrespect, you're asking "tree" questions but I think you
need first to look at some "forest". If you approach Excel as a set
of tiny details you're going to have nothing but frustration.
Get an overview of what Excel is and what sort of things it's
designed to do, then you'll find a lot of questions answer
themselves. One of the "Dummies" books might be a good choice, even
though the title is really bad.
Nice suggestion here. Being new to this forum, I observed that most, if not
all, who post are not only knowledgeable and helpful but also kind and
considerate in their language. I appreciate this. I'm learning a lot by just
reading. Thanks to all who participate.