Good choice for a first PV! Just fill and go. One fill lasts me most the day.
Tips after a month of using mine:
Make sure you are using some type of carrying case, do not just put it in your pocket (the tank will dislodge and you'll have a pocket full of juice). I use a case laying around from an electric razor; holds extra battery, atomizer, two bottles of juice, and USB charger. If I just want to carry the PV and not the gear, I use a snap box I found in my wife's closet that held a watch or bracelet. She hasn't missed it lol.
Never pick it up by the tank, always grab the battery. Made this mistake once, won't make it again. Tank came off in my hand, PV flew over my head (it's fine).