Ready to drink in 15 days is going to be a little on the thight side timewise, it might take a few days more. Go for a can of Pale Ale extract from a well-know label and use all extract instead of part extract part sugar, it will give a better tasting beer. If you use enough viable yeast, and stick to one fermentation you could have drinkable beer in around 15 days, 5 days fermenting and 10 carbonating. However, allowing say 7 -10 days for fermenting and 14 days for carbonation might give better results.
Give it a go!