I know there is a significant difference between the two boards ive listed, but i wanted to check:

I am 110kg and 186cm - i tried an Aqua Marina Pure Air (which was 10'2 x 30" wide and 4" thick and 110kg weight limit) and really struggled to balance. i know a big part of that is me and my skill/fitness but i wondered if a larger board is likely to help at all.
i found with the Pure Air the surface of the board in the middle was slightly underwater - but only just splashing.

i found the adventure king 10'6 board which is 32" wide, 6" thick and has a 150kg weight limit.
from what ive read (despite still needing a LOT to learn about balance) the additional size and volume is likely to at least help with keeping the board above the surface and maybe marginally more stable and steady while im trying to learn?
Also that for someone tall and large like me, the width is probably better?

the other option is the Aqua Marina Beast, which is similar spec to Adventure King in size etc, but double the price?

Any advice would be very welcomed about the best options - or is it really just a matter of practice to get some balance.

PS - my 9yo daughter got the 9' Aqua Marina Pure Air Youth, and has never fallen off yet!

Thanks