You're not dense..you should have seen some of my questions!!
I can't remember the icon, but it's down I think in the middle, click on it (try all if you can't figure it out) up pops your skill path screens.
In the middle of this will be how many points you have to use.
All of the skills in all character's path will show which ones you can use. All you do, is click on one of the skills, I think they have a total of 5 little knobs under them, when you apply a skill point to it, it will light up.
Make sure you save before doing. Be in a safe spot so you don't get clobbered when you come out of the screen.
Make sure you check all the paths, not just warrior. I think deadly gift-which lets you use the scorpion traps-is in the thief's path.
If you're not happy with what you've done, go back to the save and do it again.
Does that help?