this is very dangerous misunderstanding. This thing is not for beginners. I tried to write that in the review.
It can easily get you out into lineup far beyond your level. You must be very comfortable with bigger waves with the normal longboard first before going with Jet.
Also it gives you only 20mins of power jet. Unless your session lasts 20 mins, you will have to paddle manually MOST of the time and save the battery, only using jet in difficult situations and to catch the bigger waves.