It would probably be best if you could borrow a paddle or three and see what works best for you as far as length.
The local paddle meet-up group here sometimes has paddle days where new folks can come and try lots of different 'yaks and paddles.
As I mentioned above, paddling style can make a big difference. I tend toward a very upright stroke, maybe from canoeing.
Thus, for a similar boat, my paddles aren't as long as my buddy's. He has a much flatter stroke and needs more length to get to the water.
Boat width makes a big difference too. On that Essence above, I'm only using a 215 cm paddle. On the much wider sit-on-top, I use a 230 cm or a 240 cm paddle.
ETA: As you can see above, I own three Carlisle Magic paddles, a 220, 230, and 240 cm.
They used to be a great paddle for the money, running around a $100 at most outfitters.
The price has actually gone down, but so has the quality of this entry paddle.
I'm in total agreement with the review blurb I quote, having seen and paddled with one of the newer versions.
The older ones, like those shown above, are stiffer and better made.
The fiberglass shaft take-apart Carlisle Magic Plus (a.k.a. the "Simply Magic" or just plain "Magic") is still a fairly strong axe for the money, though last year the blade thickness and stiffness decreased a bit. We really preferred the older ones.