I agree with Noodle, its best to check with your insurance as some class hybrids and premades as volume and require you to be trained and certified in this and others will accept your classic certificate for premade or hybrid lashes, however, if you are serious about lashes and you want to start getting into volume then I would definitely recommend a training course as you want to make sure you learn the basics of it and fully understand the weights and different application so that you can charge your clients for this amazing treatment x