Miguel,
This link may be of interest to you
http://indiaopines.com/coorg-history/
If I remember correctly there were three or four clans ruling Coorg before the Sesodia clan (the last ruling clan) came to power.
The Sesodia clan did not always have this name, as they ad changed name four or five time over the centuries, so you will need to find their roots and follow them. Another thing you will need is to chase the other ruling clans, to see from where they origin.
If you drop the Sunday afternoon tea, you should have plenty of time :-). No, quite honestly, this kind of search does take a very long time, and it is sometims quite stony, but it pays off with all the things you learn on the way.
I too am researching the Coorg history, but something quite different from what you are doing, so now and again I find thngs which may be of interest to you.