Why is my 2006 honda civic manual transmission going into gear revving up high and moving forward slowly?

I'm not sure if my parking brake is stuck or not. It moves in reverse just fine. When i put it into first gear its moving forward very slowly even when i push the gas down all the way.

Depends

That vehicle is JUNK. PURE Junk. Guess what, Mr, Junky Vehicle?
I have a 2019 Lincoln Navigator!

Sounds like the clutch is slipping does it do the same if you try take off in 2nd does the engine rev up and go no where?

If it was your parking brake you wouldn't be able to back up very easily either. Didn't think of that, did ya Einstein?

You need a new transmission dude. Time to get one from a junkyard.

You have a bad clutch. Quit trying to drive it. Revving the motor is just going to ruin your flywheel from all the heat of the clutch disc slipping. Tow it to a mechanic.