Correct me if I'm wrong, but it sounds like youre stuck at the infamous "red room" in the mines...
Head to the area where an exhaust shaft extends out (youll see it on the security camera's in the adjoining control room). After the shaft vents head in & destroy 4 generators.. this'll stop the red stuff from killing you. At that point jump bak up to the room where the cart floats in & ride it out of the room. You'll see an opening in the tunnel to the left that leads to some caves. Hop in those caves & continue from there.
And once you get the lightsaber & force you'll start to REALLY like the game. You just gotta get through the dumb non jedi 1st few levels.