Beginner advice needed

Hi I am 60 year old 5.10 tall ( 177cm) 210 lb (95kg on the way down hopefully ) looking to jump into paddling for fitness only . I have been looking at second hand knysna jester or kr . Would these be suitable for a newbie like me if not an alternative starting boat
Cheers

Re the jester it will be a tight fit if you can get in it at all. You will be very heavy for the ski. It will float you on flat water, but in rough water it would be a very wet ride, tippy, and hard to manage. I am not familiar with the other ski you mentioned.

I agree with Zach. The Jester is designed primarily for children and is unlikely to be suitable for you if you want to paddle in rough and or downwind conditions (which is precisely what surf skis are designed for). KR as I understand it is just an abbreviation of the Knysna Racing brand name. They put that on most if not all of their different models.
Where are you? If you are in an area with a paddling scene then you will have access to many much more suitable surf ski models. Any ski described by the manufacturer as a beginner ski and rated for your weight will be a good starting point. Examples include but are not limited to; Knysna Racing - Genius RS, Fenn - Bluefin, Stella - S18S, Carbonology Sport - Cruze, Nordic Kayaks - Exercise, Think - Ace and Epic - V8 (the most popular surfski of all time).