Ring Retrofit with DSC PC 1616

I have DSC PC 1616 board which i pay $17 a month for monitoring with no mobile app, all sensors including motion is hardwired, i like to reduce monitoring cost by ring monitoring and be able to use mobile app. I have Ring outdoor cameras and video doorbell 3, so can i use the retrofit kit and base station with 2 key pad or do i have to also buy sensors? I do want to add smoke and carbon monoxide detector as well. I also have siren in the house and one in the attic for outside sound. Please provide me detail if this can be done.