Just my $.02. "Being forward is often a confusing term to people. Case and point, your are "staying forward" by bending at the waist.
Like everone says, stand upright. If in your boots at home, stand upright with your hips forward, now just sag/relax into the front of your boots (with a slight and comfortable break at the waist and upper back slightly rounded). This is your baseline athletic stance; like if you were about to return a serve in tennis or racket ball. Your should be able to stand like this for a very long time. Look at yourself from the side in a large mirror.
From here, your for/aft balance should come from flexing your ankles like everyone is saying. Again confusing but another way to put it that works better for many people is to pull your feet backwards. Imagine staning on a treadmill or somthing and holding onto the side bars. If you pull your feet behind you, your ankles flex and you get the most shift in your CG.
Flexing the ankle (again think of it as pulling the feet back behind you) also presures the tongue of the boot as you were saying. The misunderstanding about putting pressure on the tongue of the boot is it only momentarily affects the tip of the ski if you do it with your CG aft. Pulling your feet back (flexing the ankle), pushes on the front and keeps the weight there.
Going down a very gentle run next time (the bunny hill), maintaing the athletic (stacked) stance and slide your feet forward and back and really feel where the center of weight is on the bottome of your feet.