PyCharm Package install problems

hi there

not sure if this is the right place for that.
→ I tried to install networkx and pyQt on my fedora machine in PyCharm.
Seems that installation was successfull. But i cannot use the installed packages in pycharm.

How can I install new Packages for PyCharm in or not in an virtualenv etc.
I tried the package"Manager" in Charm and pip install, also tried to install it directly in der virtualenv with Settings/Project/Python Interpreter.

Kind regards