You can always check out if a particular drama is subbed or not here: https://fansub.d-addicts.com/Jdrama_Fansub_Map.
Jdorama subbers usually post their subs on D-Addicts Forum (registration needed) or on their own sites (some use free blogs like WordPress or Blogspot or LJ, others opt for paid web-hosting service).
A word to the wise. Pirates like Kiss Asian, Dramacool and myriad others will get their hands on your subs if you made them available publicly. They will claim your work as their own, and most people watching via their sites would probably clueless about who actually created them. I know that some subbers find that disheartening, so just prepare yourself for it.
Oh, and some Jdorama subbers have account here. Maybe you can try contact them, in case they're open to give you some advice? Some subbers that I know of who seem to be active around here: OldAnimeLady, YoshihiroStepper, HPriest, togepi
Good luck!