Finding a first sailboat

[Speedphreak]

I don't know if anybody is interested in helping or not, but feel free if you are so inclined.

I'm just looking for insight on a first sailboat as far as makes/models to look out for, and to avoid. Nothing super specific necessarily, just something to help narrow the search down a bit.

Here is the rough criteria I'm thinking of:

-Low to mid 30's OAL (crew = 3 adults, 1 Labrador).
-Inboard diesel
-Wheel steering (I prefer it, not hung up on it).
-Separate head.
-Not worried about racing.
-Something not prone to structural issues.

I don't need top of the line. Don't need fast. Don't need new. Don't need perfect.

I need something I can get in to in order to learn, in order to work on, in order to figure out if sailing is right for me.

What directions would you point me in? I am in SW Michigan and want some idea what to look for, and what to dismiss as I prowl the marinas and online for sales...

Thanks, in advance.