Are you sure the clutch is releasing? Try putting it into 1st gear, then start it with the clutch depressed. Hopefully it won’t lunge forward while cranking. If that is successful, put it into neutral and release the clutch pedal. Now try again to go into first, but this time wait 5-10 seconds after depressing the clutch pedal. 1st gear doesn’t have synchronizes, so it is common to get a little grinding when the gears are still spinning. Try putting it into 2nd first, to get the gears to stop spinning, then drop back down into 1st.