While I'm not as ancient as most of you guys (I'm 31
) I can chime in here a bit. I was one of those kids in my teens playing around in the park, falling a lot but never breaking anything. Tried to get back into the park in my late 20's and was scared shitless about breaking something. I still prefer natural features but I ride with upper body armour, a helmet, and like to get some air now and again.
My favorite jumps are NOT table top or kicker style jumps. Those jumps you have to commit to. Easiest to learn on (mentally) is what I call a roller. Essentially a large bump in the hill, at low speeds you'll just ride up and over it. Go fast enough and you'll get some air, maybe skim a foot or two over the snow for 10 feet, then come to earth. As you get comfortable with that you can start pre-loading and popping off the jump and start getting a little more height, even at a lower speed.
Practice over the SAME JUMP again and again and again to get comfortable and confident with the approach, your air time, and landing. Attempting some type of grab will help stabilize you in the air, just reach for your toes and even if you don't grab it'll still help. Stand straight up in the air and it'll be arm flailing time!!!
Near the end of the year last year I found a natural jump at my local hill, setup a camera and started hiking. Ran the jump about 5-6 times before I was out of energy, but each time I got more and more comfortable in the air. I've been jumping for ages but it still felt great to have comfortable air time. After that I was at another hill a week or two later, found myself hitting things with more speed than before and more confidence in the air (no park stuff though).
Hope this helps, have fun, and pay up that insurance!!!