I know alot of people that smoke or smoked weed regularly.

More then likely you're going to develop a severe case of coolness, munchies, lethargy, and down-to-earth awesomeness.

Your head will only get messed up if you were predisposed to it. It can trigger it ((when it's already there)) just as any profound event can. Almost anything can 'trigger' skitzophrenia, the only requirement is that the person be predisposed to it.

The worst thing that will happen is you'll get unmotivated and spend all your money on pot. Keep your shit in check and it won't happen.