You are a challenge Hodor... but if you have any skillz at all, I believe you should be fine on the Starboard Avanti 11'2
Its only 230 liters BUT it is 36" wide.... and I think that is enough to handle the big man!
The Avanti surfs and paddles great... it always amazed me how well it handled ALL types of surf.
Your weight will put you right at about "intermediate" float factor
230/160 = 1.44 factor ( 1.3 = advanced, 1.5 = intermediate, 1.7 = beginner)
I was 130 kg when I started on my Avanti.
It was skimming across the water.... it was floating me high and dry.
You'll fall a lot at first. Everyone does. I fell 100 times the irst day

hang in there..... it will get better!