"Live" rock doesn't necessarily mean much, where did it come from and how long has it been wet? You can walk into Petco and pickup a bag of "live sand" off the shelf, it may have been sitting there for 6 months, and there sure wont be much "alive" in there other than some nitrifying bacteria, and thats only because they dump some in before the seal up the bag.
Theres a lot more needed than just the nitrifying bacteria in a bottle. Yes, the bottled bac will help you cycle the tank, but that only gets the tank to the "it wont automatically kill everything" stage, but with such a new tank you are absolutely in the "but it might still kill everything" stage.
What you want is a crusty piece of old live rock thats been sitting in someones tank for a year +, you want to see tunicates, bivalves, feather dusters, coralines, sponges, different algaes, throw that in your display, even temporarily and you'll start off in a MUCH better spot. Dont listen to the folks who tell you to start with "dead" everything (rock, sand, all that) and to never let anything unknown into your tank. Absolutely do your due diligence, make sure to QT fish, dont introduce aptasia or bryopsis, but your tank needs to become a fully functional ecosystem, which means it needs all kinds of stuff. "The world needs ditch diggers just as much as it needs doctors."
Take a stroll through the tank emergency and nuisance algae forums and see how many tanks were started with "dry rock" that have never ending issues with dinos, algaes, corals withering away, etc. We as a community used to have ready access to real (think out of the ocean) live rock, then (and probably rightfully) that became unsustainable and for the past 10years or so we've been putting dead rock in our tanks, we've been trying to figure out why so many people run into these walls and we're starting to realize its the missing components of the reef biome. A real coral reef is an incredibly complex system and even the best of us only get part of the way there.
I'm being honest with you, not to be discouraging, but to set you up for success.