I'm still a noob, and I want to change up the flavor of my tobacco flavored juice. I checked out the DIY stuff, and got confused, especially since I'm using commercial juice; I just want to add some flavor to it. I know it's a matter of personal preference, but what would be a good start for a 10ml bottle? I don't want to try too little, and then put in too much flavoring. I also don't want to buy too much flavoring either. I also see mention of sweetener? Wouldn't that mess up the atty? I am starting to wonder if it isn't worth the extra money to just buy the flavored carts or e-liquid. Could someone clarify all of this confusing stuff for me, please?