If you're looking for something effortless, where the learning curve is minimum, you should probably looking into powerboats.
No tacking or gybing required. No need for wind. You go wherever you want.
In my opinion, the best part of kiteboarding is that you never stop learning, and you can learn so many different things that are unrelated to each other.
If you're into wakestyle, freestyle, oldschool, surfing, amputee pornography, racing, foiling, or anything really, there is always more to learn.
The satisfaction comes from learning new things, and getting better each time.
If you don't want to ever learn anything more once you get riding upwind, you must be a terribly fun person.
In that case, don't bother learning how to ride toeside, you might get dragged into learning how to do carving turns.