A lot of us seem to think that gallery people are a closed group and we are the outsiders. The truth is, gallery owners and their personnel are almost always the most helpful and knowledgeable sales people you will ever find. They know the more you learn from them, the more likely you are to buy from them. Go to all the galleries you can. Look at everything and ask lots of questions.
Most galleries specialize in certain styles or periods.
Find the galleries that carry the work you like and ask about the other work that they might have. Most galleries are not able to display all of the work they carry. If you have a certain type of art that you like, ask them if they carry anything like that. They will be very glad to bring it out and show it to you. Galleries put on shows.