You have a great eye for composition from your photos. I honestly do think that if you are selling your services as a professional, you need to understand the basics about photography.

find a photography class at a college nearby or even a private class and take it. It will really help make a lot of this stuff clear and improve your technical side of photography

When only shooting with a point and shoot, it isn't a big deal. When you start using a DSLR, it is really a shame to leave it on a program mode. There is so much creatively that can be done in manual and aperture priority!