Shopping for a New Camera

Don’t get me wrong, I love my Nikon Coolpix L 110 its been with me for 2 years and is brilliant. But I feel like if I’m going at some point to start a photography business I need at least some experience with a D-SLR or regular SLR or anything on par with that. I’d like to stay with Nikon but if Canon has a good one I’ll look into it. So…any advice? Suggestions?