For a simple interface, take a look at Wave Accounting (http://waveaccounting.com). (Full disclosure: that’s where I work). Wave is a 100% free, online accounting app for freelancers and small businesses.
And since you're in the field of photography, June is actually Photographer’s Month at Wave!
We’re pulling together financial/tax/business info, etc. with a photographer focus. We're looking for input, so if you're interested, please take our 3 min survey: http://waveaccounting.com/photographers.