Yes, bleed the system
If its hard to get into 1st when stopped or Reverse grinds(it is synchro'ed) then its a Clutch issue for sure
When you are stopped the transmission's RPMs are 0, there is no disconnect, wheel, axle, driveshaft, transmission are always connected
Engine idle is 700RPMs so Clutch is spinning at 700RPMs
When you press down clutch pedal its suppose to release the clutch disc so it can SLOW DOWN to 0 RPMs
You can only put transmission into 1st, or Reverse, when clutch disc is at 0RPMs when stopped
(shut engine off, so its now at 0 RPMs as well, and try to put trans into 1st, if its easy then clutch is the issue)
If clutch disc is rubbing on flywheel or pressure plate, which always spin at engine RPMs(700) then clutch disc can't slow down easily
Air in the clutch system means pressure plate doesn't release ALL its "pressure" so clutch disc rubs