I am feeling like dissuading you from starting myself. I am not sure how old you are, or what the situation is, but I have seen more than a few threads here with young people trying to jump in to vaping, and their models are the cloud chasers, so they want to jump in with both feet, sub ohm and go nuts.
First, I recommend asking yourself why you want to start a behavior that could lead to a lifetime addiction or dependency. Just think about that for a moment. If you are young, you might not really know what this actually means, but coming from someone who smoked for 30+ years, it's solid advice. If you can answer that for yourself, then go for it. But start small.
The consequences of screwing something up while building your device can be as dramatic as having it literally explode in your mouth. And not a little pop and a burned lip.. a big explosion with missing teeth and no lips left.
So, start with something regulated, like an eGo kit with a Protank Mini, or even an Itaste MVP2 with a ProTank on top. You can get really nice vapor production, all day battery life and the ability to change flavors easily.
The MVP will actually also give you the tools you will need to learn about what is happening with your device. You can see the direct relationship between voltage and resistance and how it affects vapor production, flavor and heat. When you decide to move forward, you will be able to SAFELY use an atomizer that allows you to build your own coils. With a regulated device, you reduce the risk of danger to almost 0. The device will not fire if you are putting too great a load across it.
Please, please be safe. Please, please heed the advice of people here. There is a strong community of experienced people that will guide you in the right direction if you decide that vaping is for you. And please, please realize the dangers involved before trying to go down the path of 'cloud chasing' or trying to push your equipment to the limits. It's not worth the risks.