LaTeX.org

Please copy the example you have problems with. I don't know what is on page 41.

Use texworks (which is installed with MikTeX) to compile your first documents.

Welcome to the forum.

Define the glossary entry called computer.

Welcome to the forum

Welcome to the forum.

I'm not quite sure what you are asking for specifically.
Aren't there enough examples?

You have been given a link with the exact same thing you wanted. What are you looking for?

I will never stop to suggest MacTeX on Mac. It is based on TeX Live, a multiplatform TeX distribution.

MikTeX was only available on Windows for a long time, and was ported to Linux and Mac rather recently.

Please show us a minimal working example.
We would like to suggest a proper solution that is suited to your document class.

What you're doing right now is far from the recommended standard way of using LaTeX.

LaTeX doesn't do grammar checks. But your editor does. Which LaTeX-editor are you using?