If you're set on a J frame I'd get an all steel version, something easier to practice with especially since you say this will be your first CCW.

I like the Centennial and Bodyguard styles, plus stainless steel for corrosion resistance. You also want the option of .357 magnum, so if it were me I'd get a 640 or 649.

You might also like the K-frame snubbies - not hard to carry with a good holster and lots of fun on the range.