This is just a possibility... The closed driveline front u-joints are kind famous for being the weak point. If its snapped, you wont go anywhere in any gear, all youll hear is clunking,,or no noise. You also wont be able to see it from underneath, as youll have to slide the "bell" back to expose the u-joint assembly.
If this is for me i do not think its the u joint there is NO NOISE at all no clunking nodda just the motor running and reving etc could the clutch be stuck away from the fly wheel?? like i said im new to working on clutches