Bought used printer. Stuck already!

So I bought this used printer "Geeetech Prusa I3 pro B" and configured it and started printing. after only one minute pla would stop coming out of the nozzle
I've tried many solution how to unclog it but nothing.
I even tried to pull out the pla at 230 degrees but it's deasd stuck..

Any help?
thanks

Can I fix this unscrewing only the nozzle?

Sounds like you need a ptfe tube in the extruder.
Exactly the same issue I had. Basically there's a gap between the filament feed tube and the nozzle.
You need to remove the gap.