TokyoParrot has made of some very good points.
Volunteer at a shelter as a dog walker. From there you can get into their foster program. This will help you understand more about dog behaviour, how to communicate with them, and how to pick one perfect for your lifestyle.
My very first dog was a 10 year old lab I adopted. I never had my 'own' dog and wanted to a dog that was easy and would not be too much trouble as it was my first time. He did not live long...but he taught me so very much. From there I ended up volunteering at shelters, working at shelters and also got involved in rescue. It's been now 16 years and I know that because of this old boy...I am where I am today.
