Your right about the Shaka it is heavy, there is a lighter version EST, than probably the one you picked up which is some 18+ kgs..............and to be quite frank your too punny for it

At 125 kgs when I bought it 18 mths ago it was perfect for me.
The advantage is the Shaka is tougher than nails................those little carbon things move out of the way when I'm headed for them

But I digress, you might also (if you can find one) the PSH 14' Hull Paddler.......I liked it and when they arrive again, planing on demoing again..........I'd jump on a SIC excepts its only 28" wide
Good luck with your search