Hi Joan, nice to meet you :)
From any profile, you should see a link to "add spouse". You can click that to enter information and create a profile for the spouse. Once completed the profiles will be linked as such. Another way to get there, or to add additional spouses, is to click to go to the "edit" page for the profile, then look on the right side of the screen and scroll down. There are options to add or edit spouses, parents, children, etc.
If the profile for the spouse is already created, the two profiles can be married together using the ID# (such as Hathaway-1200 for mine). Record the ID# of one, then from the profile of the other click to "add spouse". On the next page instead of filling out all the details and creating a new profile, simply enter the ID# in the first box provided and click to finish.
Additional information or stories can be described in the biography section.
I hope this helps... have a super day!