It's a long-term learning process, but an interesting and often profitable journey - best of luck to you!

I'd start the refinance process right away, or just pay it off, or sell. 

I did a "blind" assessment where I paid/reimbursed a close family friend to go in as a guest because there were a lot of details I wasn't privy to- and wanted to understand (the whole experience and process from the guest perspective from the initial inquiry, emails, etc.).They shared the email communications (some of which was glitchy or not quite as good as what I'd expect, or told me of delays in receiving responses).

Quote from @Jin Zhang: You initiate the process by filing a 3-day Notice.

Lessons learned are related to the title process I use with sellers and buyers.

I'm currently in the process of gathering more details from my property manager.

Is there an app that can streamline this process by synchronizing updates across all these platforms, thus alleviating the need for constant manual updates?

I just went throught the entire screening process and its more like $6,800. 

Also credit score 680 with no missed payments over the last 2 years and also check their criminal report just to make sure you know who these tenants are, as the eviction process in New York city is very long and expensive. 

I just got off the phone today with an investor-friendly real estate agent in another state (not NYS) who has a whole team behind her and has made it seem as if real estate investing is a much simpler process.