Can you please send a photo of the adjustment threads where the cable passes through the bellhousing?
Also, confirming the wording. You push the pedal to the floor, put the transmission in 1st or reverse, do you mean the car doesn't start to move until the pedal is nearly all the way up?
Once we have more info/clarification we can provide a bit more insight into the potential issues.
Does the clutch pedal sit approximate level with the brake pedal when neither is depressed?