Here is the poll managers handbook. Please review this in its entirety to get up to speed.
Here is the addendum to the poll book:
https://scvotes.gov/wp-content/uploads/2022/07/2022-PM-Handbook-Supplement.pdf
Please read this important document about the code of conduct for poll observers. It is important that you are respectful at all times.
The above excel spreadsheet has a list of potential issues to look out for, the corresponding law and the actions to take as a poll observer. Below is a pdf of the same form.