Hey Dave, I mainly use a Canon 7d with a Canon 100-400IS L, some will be with a 60d and a Sigma 10-20 or Canon 24-105, i tend to vary what i use per display. All i can say is practice and ask questions. My shots from 2 years ago are awful.Also i tend to find a photographer i like who has Flickr and go through their photos as it gives you all the settings they used. Hope thats a bit of help
Ben