Installing Ring Video Pro 2 Without Any In-house Chime

I am trying to install a new Ring Video Doorbell Pro 2. Here’s my specific situation: (1) I can easily supply 24 VAC (40VA max) to the two existing wires going to the existing doorbell. (2) There is no in-home chime. (It was contained within an old M&S intercom system.) Questions: (1) I assume I do not need the Pro Power Kit or Pro Power Cable? (2) Do I need to install a resister in the 24 VAC supply line? I saw some references to this in the community comments but don’t know if they are relevant to my situation. (3) Anything else I should know to make this work? Thanks in advance!