What should you do on your first jump with a new canopy?

If possible a high hop-n-pop. You want as much time under the canopy to do all of your control checks and get a really good feel for the way the canopy recovers, reacts to control inputs and most importantly flares.

It's also a good idea to let the DZSO or S&TA know that you are jumping a new canopy for the first time.