OK. when you're fighting, click on an emimy to target them, and choose whitch attack you want to use. (you'll need to equip a blaster or vibroblade if you're at the begining, I suggest a blaster) when you level up,go to the character view menu and select level up. Automatically doing it is bad, as you have no say in what you use your points for. it's actually easy when you get used to it. oh, and press space to pause/unpause, and click a character portrait in-game to switch to them. Hope I helped. PS: try not to delete your files, as doing the same first planet 5 times gets EXTREMELY teidus.
EDIT: Use stims and shields for boss fights, and save OFTEN!!!