Totally agree with Grafta on placing emphasis on having fun. It's good to progress your skills but dont put too much pressure on yourself to ride blacks just for the sake of it. JH has tons of spots for intermediates to enjoy.
That said, there are double blues (dotted lines on the trail maps) you can try out. Laramie Bowl looks scary on entrance at the top but once you get down a bit, it's just hard work of the fun sort. Since it's ungroomed, recommended trying it if it's powdery or mash potatoes sunny.
As for technique on steeper runs, learn to trust leaning forward on your front foot - think of it like a pivot point. You'll find that pivot allows the back of the board to wash around much easier. Seems counter intuitive but it works like magic!