In that case first thing you will want is a half decent machine set up for sewing ripstop - get some scrap ripstop, practice and get the tension set correctly so the stitch sits correctly in the fabric (google will bring up lots of how to pages).
If you dont have a machine yet look for old ones with metal gears rather than modern ones with cheap plastic gears. I use a vintage Bernina which is very nice and kite makers swear by Pfaffs but both are pretty expensive. You can make a kite with just a straight stitch but a serpentine or 3 stitch zig-zag is handy when you do taped overlap seams. Otherwise you wont use any fancy stitches.
Sew yourself a Rokaku out of cheap ripstop to get the hang of it. It will be a challenge to get your first one to fly straight
Get accustomed to sewing fast - your seams will be straighter if sewn fast than stop/start
Then look for plans for a kite called Orange by Simo Sivonen http://www.kiteplans.org/planos/orange/orange_e.html
which has step by step pictures
Hans Raue also did a nice step by step build of one of my kites here http://buildsomethinganything.blogspot. ... -page.html
Theres a few construction tips on my site http://www.iannewham.com/kitemaking/construction.html
but not really how to get started stuff
(Oh and correct url for kite plan base is http://www.kiteplans.org