Practise saving your files in the appropriate format for laser cutting.
Separate your shapes again and set them both as RGB Black Strokes with no Fill.
Practise nesting your files, using the selection tool to move and rotate shapes as required. This will allow you to make maximum use of the material.
Make sure that your files are in the centre of your document then go to the File menu and select Save As. Save your file as a .pdf on your desktop.