Live Rock/Base Rock Question

[Eb0la11]

So I got another question lol. Ok so keep in mind this is my first ever start from scratch tank, including my fresh water days. Ive always had some kind of seeded bacteria (such as in a filter or whatever) for FW, so Ive never gone through a brand new cycle really. Only small ones when I add stuff to the tank.

So yesterday I put in my live rock. You can see what kind of live rock I have up above.

I only put in LR 'B' and 'C' from that list. LR 'A' is curing for several weeks Ive decided.

Soooo, I feel like I have good LR that has been well preserved and doesnt have much die off because today I took a reading for the first time (roughly 24 hrs after putting the LR in my tanK) and right now my ammonia level is zero and my nitrite level is zero as well. Nitrate is miniscule as well at between 5-10 ppm.

So obviously I have some denitrifying bacteria on my LR already. So my question is, do I have a bigger release of nutrients on the way that will cause a big cycle? I mean I thought I'd be experiencing it in my test levels by now. Am I foolish to be "dreaming" that I can add my CUC two days after adding my LR to a brand new system?