Contribution Tutorials (different Git clients & methods)

[IndigoWizard]

(comment "taken" and precise which tutorial you're gonna work on so you'll be assigned. Multiple assignees can work on this issue) Add a detailed walk through tutorial for one of the following:

• [x] Getting started: GitHub (In your Browser) - (Easy)
• [ ] Getting Started: GitHub Desktop (GUI) - (Easy)
• [ ] Getting Started: GitKraken (GUI) - (Intermediate)
• [ ] Getting Started: Git (CLI) - (Intermediate)
• [ ] Getting Started: Visual Studio Code (CLI) - (Intermediate)
• [ ] Getting Started: Git CLI + GitHub CLI - (Advanced)
• [ ] Other clients & methods

Mind these criteria:

• Tutorial should be about contribution process to this very repository (younglings tend to be confused, this should help)
• Use clear and comprehensible method.
• Use English for the tutorials.
• Use images to illustrate steps ( screenshots, .png or GIF of this repo will do)
• make sure the illustrations are clear enough
• Highlight the important commands
• Keep it simple, no need to use Marvel Multiverse to explain how branching works (I reserve the right to do that cuz, yeah)

[ghost]

Getting started: GitHub (In your Browser) - (Easy) taken

[ghost]

PR open in #19