On Saturday night, I boiled up my first batch of beer from a extract malt kit (True Brew IPA). I believe I followed the instructions accurately except on the advice of a friend, I substituted a WLP-001 yeast for the yeast that came with the kit. After cooling, I transferred the wort to the primary (which in my case is the 6.5 gallon bucket with air lock) and now two days later, I don't see much happening. I have what seem to be stationary air bubbles in the air lock and see no bubbles breaking the surface. Please forgive my ignorance, but is this normal at this stage or is this evidence of lousy fermentation and what should I be looking for to indicate that things are OK?