IMO the freeform pen tool would not be good pen tool for controlling curved line segments while making a selection. The Content Aware Tracing pen may be useful. I tend to use the normal Pen tool and the curvature pen tool. I removed the freeform pen tool from my toolbar.
There are many tutorials one the web on how to use the pen tools. Its not hard but it does require some learning and partice. Photoshop Pen Tool Tutorials