I'm about a week behind you, on semisolids as well. My surgeons instructions are 600-800 calories a day, 70 or more grams protein, and less than 40 grams carbs. Be real mindful of the carbs, theybwill increase your appetite. I saw you mention yogurt... You want plain, Greek yogurt, which is high in protein and low in carbs, for instance.
You might also want to post these kinds of questions in the VSG forum since fellow patients will be more in tune with your dietary needs.
Also, you can't possibly have streached your stomach already. Remember non solids like yogurt will slide through fast. Right now, I can eat a good. Lip of yogurt, but not meat.
Hope this helps.
Heaviest weight: 310 pounds (Male, 5'10")