Seek out local training, either a CCW class as a starter...especially since you'll want to know the legal part of carrying in your area, as well as the tactics.
While you're in that class ask the trainer or classmates about someone that is willing to train you in some basic combat pistol tactics. Then go home and practice them until they are second nature.
The last thing I would recommend is going to someone that can impart to you, without sounding like a drill Sargent, the finer points. These type usually charge you a lot of money foe a 2-3 day class, but you go away with some great training.
Lastly, don't discount the value of video training from youtube videos, some of them can be very helpful in getting to a level of comfort that will also give you more confidence. Watching video training DVDs can go a long way to making you more proficient, and there are a lot of trainers making them these days.
"The Constitution is not an instrument for the government to restrain the people, it is an instrument for the people to restrain the government." - Patrick Henry