Not quite sure what the issue is that you are having, it could be a layer issue or simply not making the connections.
To begin with always be on top view so the arcs are being drawn on the surface.
Add straight lines or other arcs from the end of the previous one until you link up to the first straight or arc you drew.
This should complete a solid shape that you can click inside to highlight
Then use the off set tool as shown in
Post 2 of this thread.
Start off with a few simple shapes to get the hang of it first then more complex circuit designs