Used battery reads Cycle Count: 0

The computer has a Micro-controller called the System Management Controller SMC.

The power adapter has a micro-controller of its own.

The Battery has a micro-controller of its own, which maintains the number of charge cycles and supervises charging.

An SMC Reset should get them all on the same page:

How to reset the System Management Controller (SMC) on your Mac - Apple Support

follow which side of the keyboard the noted keys are on, not just their labels. Your battery is not considered removable.

It isn’t the “cycle count” part that you should be worried about, it is the “condition”. It says “Replace Now”. You should do as instructed. You don’t want to take a chance with Lithium batteries. They can explode and catch fire.

Apple offers flat-rate battery service for your machine. See this document: https://support.apple.com/mac/repair/service

Lithium batteries can become damaged when they are left completely discharged for any length of time. When storing a Lithium battery you should make sure it always has a 30%-50% charge to keep the battery healthy which means you need to charge it periodically.

See the section "Store it half-charged when you store it long term":

https://www.apple.com/batteries/maximizing-performance/

I agree with etresoft, replace asap, danger !