Newbie landlord looking for advice on non paying tenant in NJ

[Nicholas R Paust]

I recently acquire my first rental and the tenant paid the first month on-time.  As of yesterday Aug 1 they are now two months behind.  I reached out to them the first time and apologized and said they are going to be paying along with the late fee.  I reached out again yesterday after not receiving either payment and was told they are applying for assistance.  The property is located in NJ and from I understand the eviction moratorium goes until Jan 1, 2022.   I just wanted to know should I be doing something now to protect myself.  So far I just sent a certified letter saying they were 1 month behind and acquired a late fee.  Is this something I should continue?  I also noticed the assistance they applied for  is a lottery so who's to say they'll get it. The assistance  program is Emergency rental assistance program (CVERAP) phase II   https://njdca.onlinepha.com    

Also would you recommend i seek legal advise and if so any recommendations in NJ

Thanks