The most important step is to properly prime the carto. How well you do that will determine how well that carto will perform for the rest of it's life in the
tank.
Hopefully you got the tank accessory tool which will protect the cap's o-rings, and make inserting the carto into the tank and doing
juice refills much faster and easier.
Be sure to do long, gentle draws - not short hard pulls. Imagine sucking on a straw in a thick milkshake; use your cheek muscles to get a mouthful of vapor.