that board is brand new ... and 100+ cm wide
the 205 litres will float you in NO wind
personally think it is a bit wide for starters
i learned on a longboard and spent 10 years on it before going short boarding
lately i have actually gone back to longboarding and have an older raceboard and soon an older boat like Division 2 board
if you have good balance and go in lighter winds, you can go narrower
as i am as heavy as you - in a shortboard i would not go under 160 liters and 80 cm wide - to start
if it is mostly light wind and there are older longboards available
you can ask here if the older board is "worth your while"
ironically many people in Australia still sail the original Windsurfer
and i believe there is a division 2 movement as well ...
if you have the cash and are ready to sell it after trying it - the JP Funster will sell
are you guys approaching fall/autumn now ??
maybe you can rent equipment for the rest of this season
take some lessons and see what you like - or dislike ??
i always say patience, patience and then i myself have rushed into many purchases
for me - every session or attempt is fun and i feel with a good attitude and patience everyone can have the same :-)
lotsa luck outta cold Canada