Have you looked at similar threads on this site?
Lots of the same request.

Check out yostwerks.com for simple lightweight kayaks.
I suggest the SeaBee 13 if you want relatively short.

Or try Dave Gentrys 12' boat http://www.gentrycustomboats.com/C12%20page.html a little heavier, wider, possibly easier to build, but I haven't done one.

CLCboats.com has plywood stitch and glue boats, some designed by our host - Nick Schade. http://www.clcboats.com/shop/stitch-and-glue-kayaks/?jm=1

Or you could go direct to the source at Guillemot Kayaks, shown on each page here.

For all wood, stitch and glue from a kit will be fastest and easiest.
For lightest it will be the skin on frame (SOF)
For prettiest it will be Strip planked. also check laughingloon.com or redfishkayaks.com