Yep, you wont have any numbers until you add ammonia or a fish source of ammonia.. it generally takes 3 or 4 days to get enough from a fish to get a good reading.. I'm hoping you're fishless cycling.
Read the thread at the top that's stickied and it will give you a lot more information. You're doing the right thing going fishless cycle, it's just going to take a little longer if you're doing it will flakes.
There is another recent threat about someone cycling with fish flakes, seems a lot more difficult then using ammonia. I used cycle at the start as it came free but i dont think it had any effect. Are you sure the bubbles arent just from where you filled up the tank, I get lots of little air bubbles when i filled up the tank for the first time and when i did two big water changes.