You are medium weight.
Go out in 6-7 m/s (12-14 knots) with a 10-11 m2 kite.
This will be the easiest and safest conditions to start and learn in.
15-16 knots could also be used, with an 8 or 9 m2 if you have to, but a bit more risky.
Your kite wont be too fast, and no dangerous situations.
You will have loads of power to get up and just park the kite, without getting torn leeways which is the most common hazard.
It will be able to hang steady and never drop.
When you get up and start foiling a bit more, these sizes will be a bit too big for many - but does not matter when starting, where you should have only one size less than on an "old" board (TT/Wave).
Deep water and not onshore winds - and be prepared you WILL crash your kite a lot, on your first foil attempts - so you should be ready to relaunch or drift ashore