Why don't you just single-hand your H16? I started sailing at age 15 and about 135lbs and a H16 was my first boat. I spent most of my time sailing it solo. Plus you already own the boat!

I'm 22 now and 145lbs and I usually solo a G-Cat 5.7M. It weighs in around 400lbs with gear. I'm working on a righting pole for it (using the bottom half of a windsurfer mast) to make righting solo easier. It's old and heavy in comparison to the hot new boats today but it's everything I want in a boat.