Most PSD courses require that you be associated with a team, so finding and getting in contact with a local team (usually independent [Columbia River Dive Rescue] or associated with the local police [Port of Seattle PD], fire, or rescue squad) is the second thing you want to do.
The first is taking a long hard look at what a PSD is/does and, once you understand all that entails, asking yourself "Is this for me?"
There is little glory in saying it is and absolutely no shame in finding it is not.
You're right, the teams are fun; the good ones are a family. You simply cannot do the type of dives public safety diving requires without a support group with whom you trust your life.
The dives are zero vis, high entanglement, (generally) tethered solo dives with the very real chance of coming face to face with a cadaver. We have strong teams so we can safely and routinely do those dives, and so we can deal with the aftermath of those dives. Nobody expects or pretends recoveries are fun, but they can be deeply rewarding.
They can also be haunting. Read over the posts in this forum.... there are very few former PSDs who still dive. If you're making your living as a diver, you don't want to worry about seeing a face in your mind every time you hit the water.
From your profile and posts, you're a young, relatively inexperienced diver. While not necessarily a bad thing (I moved into Public Safety Diving from EMS as a young, inexperienced diver before earning my current status as a slightly less young, slightly less inexperienced diver), make sure you realize what you're getting into, how much work it's going to take, and to listen to the more experienced divers on the team. It is rewarding... but it's constant training for infrequent, emotionally taxing calls.
So, read the forums, read Teather's Encyclopedia of Underwater Investigations, take a long look in the mirror.... then start making phone calls.
