Stick with the H16 if you love them.
You can buy a used one very inexpensively.
Lot's of support for newbies at the regattas.
At 250lbs, you only need to add 35lbs to make yourself class legal.
Short of the H16, I'd recommend the TheMightyHobie18.
Same reasons as the H16 but easier to sail on the main alone. Easier to tack too.
You're still within the range to add weight and be class lega.