Are you using software? If so, which program?
ProScan, as well as ARC-XT, support programming NXDN for your 325P2. While basic conventional frequencies, analog as well as P25 trunked systems, can be programmed in your scanner via FreeSCAN, FreeSCAN does not correctly support DMR programming, and cannot be used at all for NXDN.
If using ProScan or ARC-XT, you can directly import your city's system into the software, as I see you are a Premium Subscriber.
This can be done directly via the keypad, but with the various pieces of information that need to be entered, that would be a very tedious process. Besides being much faster, software allows you to see most all of the information needed and entered at one time, making it much easier to spot and correct any errors or omissions. Both programs have a 30 day free trial, so you could try either or both, and decide if you wanted to purchase a license for the product.