Aloha Harrkev,

I do not know of a website, but I am sure google will turn up at least a few.

As for learning...it would be the same as everything else. First, try to learn what you can. That way you have information.

Then pick one up and play with it. Don't just take a bunch of shots and put it down. Try to really get a feel for it. Try different things and see how it works. See what aiming technique works for you. Try different ammunition. (I even did a pouch full of bb's. For me, not real accurate but see the spread. Shooting it into water gives me an idea of what the spread looks like.) See what doesn't work. Now you have experience.

When you can integrate the information and the experience to get your solution, then you have knowledge.

Don't ignore the failures. We probably learn more when we study what didn't work than what worked. And we learn the most when we are in the "consciously competent" phase of doing something.

I did see a mean looking slingshot with built in laser sights. It looked powerful and accurate, but I kind of like my low tech, simple version. Less chance of equipment failure and easier to replicate in the field, if need be.