You area student. I presume that mean you are under 25. In Taiwan the government provides free local youth tour guides to english-speaking youth. They aren't travel experts, but they are locals.
I can't seem to properly link the actual website, but this seems to be the "root" website, http://eng.taiwan.net.tw/
Oh and taroko by scooter can be a little rough if you don't constantly pay attention to traffic.
