All small boats are going to be more sensitive to wind than the larger ones you see or read about; yours will be even more tippy. Based on the specifications on this site, that sail area difference actually converts to about 16% more force over your head (256 sq. ft. for a H26 versus 220 sq. ft for a H22). The keel (thus the righting force against the tipping impact of the sail), was designed for the original sail area. I suggest that you start out in wind speeds under 10 knots (no whitecaps on the water) and with a reef to reduce sail area. Ask around, or on here, how to put in a reef for your particular sail. I've found for all complex sports (golf, skiiing, etc.) that a few lessons will not only make it more fun, but also keep you and your family safer. There's nothing more frustrating than getting dunked a few times and not knowing what you're doing wrong. Take some lessons and good luck.