How to Use my Left Hand more Freely When Playing the Piano?

Several ways! I've been playing piano since fourth grade, and now I'm going into high school. One thing you can do is pretend your wrist is glued to the piano (the edge part that's under where the keys are) and play like your fingers are little hammers. Also, just make sure it's all relaxed, and that you aren't using your arm muscles to play, you're using your finger muscles. You can also put your wrists high above where your fingers are playing, so you have to really hammer down and partially straighten your finger to hit the key. Just focus where the energy is going. Um..what else..You can do scales! A technique for doing scales is 1) put your hand on the key BEFORE you actually play it; always be prepared. And plan your fingering! And 2) do the notes two at a time. Like play C, assuming you'd be doing C scales, with your 5th finger and then D with your fourth (doing everything I said before at the same time, like the wrist thing, and preparing) and then D w. your fourth finger and E with your 3rd, and so on. So pretty much 2nds. GOODNESS I HOPE THIS HELPS! Good luck. :)