Just don't make the face too steep, or you'll be wanting to endo every time.
My and my buddy started off much like you. We were all into BMX and had a good dozen or so jumps around. Then dirt bikes came and we started making the jumps bigger.
Right away we learned to stick anything you can in the jumps so they take less dirt. Logs, stumps, whatever. Also, table tops take way too much dirt when shoveling by hand (the only way we ever did it). In the beginning our jumps were kinda tabletops, but with a lot of dirt taken out right behind the takeoff, because you have to go dead slow to fall into a hole 2 feet after the take off. And everything were we lived was sand. Nothing but sand. So you hit a jump like 3 times and the face would be shot. Old carpet (THICK) and plywood became our friends, especially once ramps got larger.
Before you know it you're going from 2 feet of air to 12 feet, and playing paper-rock-sizzors to see who has to climb the tree and cut down the branches that are hitting you in the face some 15 feet up there.