Put me in the corner of those who think you should stick to dry yeast for now, since US-05 is great for American style beers and has lots of cells. When you use dry yeast, you can rehydrate it in warm (not hot!) water before adding it to your beer. But you can also just sprinkle it on top.
If you want to use liquid yeast, just dump it in the carboy. Use two packs, unless you make a starter. A starter is a weak wort you use to grow more yeast for your batch. You can find details at mrmalty.com.
I also agree you probably racked it too soon. Do you have a hydrometer? I wouldn't bother with a secondary for this type of beer, better to leave it in contact with the yeast for a bit longer.
How are you aerating the wort?