Here is a video that shows the Proposal and Wedding Events for Will in Sunshine Islands. It includes details of basic marriage requirements. The video begins with stills, but then is followed by videos of the Wedding Event and finally, the actual Proposal Event in video form. The text is far clearer in the screenshots, but I felt viewers would appreciate the actual Event as well.
And no, Freya is not happily married to Will as she still must continue the single life for awhile in order to experience ALL Proposal Events and Weddings with ALL Bachelors before she can settle down to a permanent life... It almost broke her heart to be forced to reload back to a point where she lived alone in her farmhouse, Blue Feather still safely stashed in the Cabinet, awaiting future use.