Grinding Gears With Manual Transmission?

My car is a Ford Escort 1.8 L 1999 Turbo Diesel

My problem is when I shift from neutral to first or first to second I hear a grinding sound.Obviously this is not a good sign. The clutch is all the way on the floor when i shift, so I don't understand what causes that? Can anyone explain what's wrong with the gears and what should I do?

Could be that the clutch release mechanism is not operating fully

The synchromesh is shot. Exchange gearbox needed or trade it in.

Sounds like you need a mechanic to adjust the clutch, which is probably not disengaging sufficiently, ie. Due to something wrong with the cable or its adjustments.