Hello I'm new to vaping but I do love it.. I have a few mods. I have a sigelei 30 watt with a kamgertech tank, sigelei 150 with temp control but not quite sure how to use it yet. They recommended nickel coils so I got it. I want to get into building coils but can't understand for the life of me ohms law. Can anyone help me I'd appreciate it very much