Fox,
The SIG Skyray is a good one to start with. You can get extra balsa and make replacement parts as you make the ones from the kit...or at least trace the parts outline on the back of the plan for if/when you need a replacement part.
You can set the controls for minimum control at first, then change to more control when you can handle it (change is an easy process).
What kind of surface are you flying on? Grass is much more forgiving than hard surfaces.
For string, you might try some of the modern non-stretch fishing lines.

Good luck, whatever you decide.

George