This is an absolute piece of cake to make! It's oddly a very expensive treat whenever I see it for sale, and there's no reason for that. Basically use up your trash (the rind) then put in really just a few minutes of work (and quite a few hours when the rind is just soaking in different types of fluid) and that's that. I'd say it's much easier to make than jams and such.
I forgot how wonderful watermelon was until I made that salad the other day, and now I have all the more reason to go buy some more of it. I can keep myself stocked in cheap rind for the rest of my life. Woohoo!
I love making something I've never made before, especially something that, for some odd reason, seemed mysterious or complicated to me. I guess it was just so foreign to me as I never saw/heard of the stuff until my mid-20's that I imagined it to be complicated. Huh. Strange how the mind works.