Yes, you can. The die off from your LR
will feed the cycle. Your pH may go down, your ammonia will spike, followed by your nitrites, then finally those will all be zero and your nitrates will be through the roof. That's a good thing. Do a 50% water change after that, 20% for about two weeks, retest, and if all parameters are good, start with 1 fish. Hope this eases your mind. I know you wanna know, but for the most part, your not going to get a bunch of ppl repeating the same advice. If someone gives good advice and we don't have another opinion, we move on to another thread. I'm glad to see you so eager to learn, but some stuff you gotta look up yourself and sometimes fail to learn. Trust me, if your patient, I have every bit of confidence you will do fine.