Improved Introductory Tutorial Page (#433)

This PR solves #434 by improving on the existing introductory tutorial through adjustment of the grammar and vocabulary of the sentences, rewriting of sentences, writing new descriptions for sub-headings, and adding new link references for the corresponding discussion elements.

I have not replaced the inline script ascii calls yet, and there might be a few other things that might require some adjustment. However, this version looks much cleaner, consistent, and descriptive that the previous iteration.

Co-authored-by: ArthurSonzogni <sonzogniarthur@gmail.com>