Congratulations on your inaugural kayak sailing adventure! Kayak sailing is a bit different -- everything happens very quickly!
Yes, a couple of blocks will help a lot. There are some pics of different rigging methods on the site if you care to look. With a little practice you can actually shift your weight quite a bit, and it makes a lot of difference.
It's more successful if you take your feet out of the pedals and push against the opposite side of the cockpit as you "hang" (your arm) over the side! It also helps you keep from getting tossed around if the boat heals suddenly.
With a little practice and some improved sheeting gear, you'll be able to handle up to 15 kts with no problems.
But if you get the Sidekick, then all you'll need is a cleat.