Hey ELSBP

From my experience the dremel has been a very easy tool to use, but you must have a steady hand to use it or your model will fast become a scrap heap. If you dont want to buy or use a dremel, I would use just a simple knife set either by xacto or pro-edge both are good makes. And always have some fine sandpaper aroud I cant stop finding more uses for it.

P.S If your just cutting parts out of a sheet and not shapeing them a knife is best