It is very rare that you would need to use vodka in your DIY. It will help break down oils and help them mix with VG/PG but I stay away from any oily flavorings. They are hard on atty's and not good for your lungs. If have any questions along the way I will be glad to help short of giving some of my secrets. DIY can be fun and very rewarding, once you mix a few the fear will turn into a fun driving force.