New Ring Alarm install - Ring Protect Plus Plan 30 day free trial

I've just installed a new Ring Alarm system a few days ago, and so far I'm impressed with the hardware, app, and overall features. But I'm a bit confused about how the 30 day free trial of the alarm monitoring with the Ring Protect Plus plan works. I have NOT yet signed up for monitoring (in the app's Settings/Monitoring/... section). However I notice a banner at the bottom of the app dashboard says "Ring Protect Plan: 27 Days Left! Tap here to keep monitoring". I don't have any Ring cameras, so it's just the alarm I'm using. I haven't set up any emergency contact names/numbers or secret password anywhere, so I don't think monitoring has actually started?? Or has it? What's the proper way to get the 30 day trial of Protect Plus monitoring going? If I proceed to set up the Settings/Monitoring info, does that immediately start the paid monitoring subscription, or will the first 30days after that be free before being charged the monthly rate?