I have a 8 foot soft top. I weigh 95 kg. I also have hard boards 6'6 to 8'. I find standing on the softop it tends to bend which slows forward movement. I'm not sure those recommending you get a softop have ever ridden one.
Borrow some boards before you buy something.
At 110kg you are going to need an 8'6" round nose and tail and thick.
Maybe dull the back of the fins to avoid cuts.
Find somewhere where you can practice without injurying any bystanders.
Catch small broken waves away from others.
If it smacks you in the face, welcome to surfing.