How do I print an iPad note?

Here is how to use AirPrint from iPad: Print from iPad - Apple Support

If you have a printer without AirPrint support, check with the printer vendor, as some have printing apps.

I presume your question relates to the actual process to print from the native Notes App - as opposed to configuration and setup of an AirPrint Printer.

You can print a note directly from iPad (and iPhone), but the procedure is perhaps not immediately obvious...

From the Notes sidebar, locate the Note that you wish to print from the list. Touch and hold (i.e., long-touch) the Note that you wish to print; an Action Menu will appear. From the available options, tap Send & Copy - and from there select Print from the Share Sheet.

Alternatively, from the Note itself, tap the ellipsis icon (three dots), then tap Send & Copy - and then Print.

I hope this information prove to be helpful in resolving any difficulties.