if you can see the pressure plate coming out, while the clutch still won't disengage, then the first thing I would look at is the bearing in the clutch hub
the center part is hooked to the shaft & drive sprocket & chain while the outer part is hooked to the small gear
hold the bike from moving, take out spark plug, and with pressure plate off try to turn the large gear or small gear - if neither will turn, you may have debris from the pads stuck in the bearing
that bearing is way hard to get apart, but a new clutch hub is cheap