Cooking is a subject you can never know enough about. There is always something new to discover.
I wasn't passionate about food until I'd been cooking for a while. I started long before food became part of the mainstream media. I just wanted to cook, period.
I guess I fell into cooking.
Charcoal or gas. Both give excellent results, so choose the one that best suits your style of cooking.
Cook ingredients that you are used to cooking by other techniques, such as fish, chicken, or hamburgers. In other words be comfortable with the ingredients you are using.