Paddle sizing is not an exact science and is highly personal. That said, your kayak is a sit on top so you are not having to clear gunwales (the kayak sides) at a height above your waist as you would in a sit inside kayak. You are about my height though longer in the torso. and though I have never had a kayak as wide as yours, I used to use a kayak paddle when using the tandem canoe than I shared with my former boyfriend and that had a beam of about 30 inches at the point where I sat. I used a 230 cm for that but you are closer to the water than I was in the raised canoe seat so the 220 should be fine. And you probably have longer arms than me. Certainly no longer than 220 cm for your height. You may get others offering different opinions for just as valid reasons as mine – like I said, this is not an exact science. I have paddles ranging from 185 cm to 230 cm for various boats and conditions myself.
You may find you have to use a higher angle to place the paddle blade fully in the water than you might be using if you have not had any formal instruction. Kayak paddling is NOT intuitive and if you can take a lesson or two it would be helpful in getting a comfortable and efficient stroke. Your torso should be moving back and forth when you paddle – don’t just sit facing forward and windmill the paddle with your arms – that puts a lot of stress on your shoulders, wrists and elbows and is tiring. Look at YouTube videos for “kayak paddling torso rotation” to see how you place the paddle in the water and use the strength in your body to move the boat forward. It becomes very natural once you get the hang of it. It’s easier to see it than explain it.
If the paddle you bought has a metal shaft and heavy plastic blades, it would be a good idea to keep an eye out for a fiberglass one that is lighter. I have found used ones for under $50 over the years, but even decent new ones can be found for around $100 - Harmony, Bending Branches, Werner and Cannon all make some reasonably priced paddles. Used paddles by Werner are pretty common since a lot of kayak packages include that brand and people who later upgrade to fancier or carbon fiber paddles will sometimes sell their Werners.