Visual signs do not indicate fermentation. Given that you pitched yeast it should be fermenting fine. 68 is fine. I ferment my blondes cooler around 62-65.
Actually you probably pitched less than you should have because it is advised that you use a starter with liquid yeast. But everything should be fine since you have s vigorous fermentation.
American Wheats, Kölsch, Cream Ale are good lawnmower beers and can be found on Northern Brewer. Biermunchers Centennial Blonde is a really good beer and can be found on the forum.
I'm getting my ingredients today for a Imperial Porter. OG: 1.132 14.7% ABV My biggest beer yet! Going to be named "Queen Bee" because of the 4lbs of honey. I though it was a fitting name :D Goodluck.