As far as the divorces go, click on on the little square with the pencil inside (just to the right of the marriage date on the couple's main box. Go down to the relationship events and click on add event. The first box says marriage but click on the arrow and select divorce. Then add the date, place and reason. then save. If you have the actual document, scan and attach to the relationships sources box.
As far as remarriages, did the couple get divorced but then remarried each other again or did they marry different people?
If they remarried the same person a 2nd time you can just do the same step but add the new marriage date and place and state they remarried.
If they married different people, if the person is attached to the new spouse, if the marriage information isn't there or incorrect, edit the same way as above. If the new spouse isn't there, click on the add spouse box on the main page and enter all the information you have on them and the system will do a search for a duplicate. If it finds an exact match, select and then you can edit any information you have and attach sources. You may find multiple duplicates and if so. do merges.
@LisaLaGrange1 So glad you've joined FamilySearch! It is a great place to learn about and memorialize our ancestors! I hope you continue to enjoy the journey.
To add a second marriage, or any serious relationship, or a relationship that produced children, go to the person in question's page, look at them and their first spouse, make sure the person with two relationships is in bold, and above their names it says "add spouse". If you click that you can add a spouse to the bolded person.
Between the couple is a pencil icon to add details about the marriage.
As for the divorce I would go to "other information" in the middle and click "add information" and click "custom event" and add what you want.