Suggested text edits

[JohanForngren]

Let me preface this by humbly acknowledging that I'm not an editor nor a native English speaker. I'm new to GSMM, so simultaneously as I read through everything, I ran the texts through the proofing tool Grammarly and kept some of its suggestions (as well as some minor of my own) in PR #43.

My main intent is to ensure that the language is as clear and accessible to as many as possible. I'll happily discuss and rework the edits as you deem appropriate; I'll take no offense if suggestions are discarded.