Dartboy
At your height, weight and, as I read it... total lack of surfing experience.... my advice is Go BIG.
I weighed 130 kg when I made the switch from prone to SUP surfing.
Even though I was a competent surfer.... I fell 100 times the 1st day.
Claimer:
Let me say upfront, that I am the acknowledged Sunova mascot and chief pimpster.... I
strongly recommend:
The Starboard Avanti

11'2 x 36" wide at 230 liters
It is a great "Big Boy" surf SUP and a lifetime keeper for surf and flat-water.
Don't let anyone tell you that it is too wide at 36".... it is
not.
It surfs amazingly well in small to OH
A big board will speed up your learning curve and help you enjoy the journey.
I am posting a bunch of pictures.... because that is what I wanted when I was first looking for "Big Boy" info