I'm currently working on Lab 2b, and I am stuck on Step 53, where it wants me to edit a meeting and add a contact name. When I hit the edit button, the contact name option does not show up, but I did the steps beforehand to add the feature into the meetings option.

You might have clicked thru the Next, Next too fast when you were creating the Contact Name field so those pages didn't get a chance to load and the field visibility is not turned on. So it is there in the object but it won't show up in forms & reports, etc. So probably the easiest thing to do is go back into that object and delete the field and then add it again but this time go slowly thru the Next, Next part. Then the visibility will be on and you will be able to see it on the form.
Let me know, ok?