Clearer readme and add link in setup

[SmolParascythe]

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• [x] I have tested my changes against the review branch (the latest developmental version), and this pull request is targeting that branch as a base
• [ ] I have tested my changes on Python 3.8 or higher
• [ ] I have ensured my code is formatted using Black

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Description

• Fixed any grammar/typo errors I came across
• Reworded some sentences to be clearer
• Added a link in setup for example_options.ini

Related issues (if applicable)