If you are working commercially with the educational version then, shame on you.
The educational version is intended for student to learn with and when you finally move to the real version, none of the files you are making now can be used.
Organic forms can be made in Archicad, with limitations, by combining mesh, arches, Solid Element Operations and complex profile walls - all of which are in the basic tools.
Archicad coordinates well with Maxon's Cinema 4D [yes, yet another $$$ application] for those impossible, organic forms all naive beginners seek to create until they meet up with the quantity surveyor.
If you post a sketch of what you are after to the forum, members WILL guide you.
Dwight Atkinson