Bleeding the clutch means flushing brake fluid thru the system to get rid of air bubbles. Search, I've posted a few times how to do it.

Try pumping the clutch pedal then holding it down. Does that work when it's cold? If so, that's a good indication there's air in the line.

If the clutch is worn out, you need to remove the transmission in order to replace the clutch. One way for a clutch to wear out is the clutch plate wears thin, then it slips under power.

Another way for the clutch to go bad is the disk warps or the flywheel gets unevenly glazed. Then it might shake & shudder when you're starting. Or if it's warped it might always drag, like it's not disengaged all the way.