First off I'd like to know if its even possible... Second, if it is possible, where is the first place i can burn the shield off. I'd like to do it as early i the game as possible.
I don't think you can burn off your shield before Gororn Mines, so you'll want to bur in off there, I don't know if it's possible to go completely shieldless through the rest of the game
Just burn it off. However Twilight Princess being so easy you won't have much trouble at all. I hardly even used my shield because of how easy the foe's were, not even when I did my three heart run.
It's easily possible [done it at least twice], I think first place is the scene right after you get your horse back in Kakariko Village, just let the Bulbins shoot fire arrows at your shield and let it burn.
This is interesting. I've never thought about this before. I've never tried, but I'd guess it's definitely possible. If memory serves me, I don't think a shield is required to do anything important in the game.