Hi

If you open up the extruder so the filament is not clamped, you should be able to push filament through the hot end by hand. You can prop the clamp arm open with a screwdriver to allow this. If you can push it OK, then your system is not clogged. If you can't push it, you have a clog, a low temperature, wrong type of filament, or an incorrectly assembled hot end. There is a troubleshoot list for each of these paths....

Bob