Hi
Start by studying plan for a while and work out how it all goes together and make a list of the the materials you will need.
To make the components i trace each different part onto drafting paper ideally or tracing paper, Then use a pin to mark the components through the drafting paper onto the balsa ( this can be reused later using the same pin holes to create very accurate replacment parts if needed) any parts that are the same such as ribs, fuz sides ,etc i glue a stack of wood together with the marked out piece on top with a pritt stick and cut out and sand all at once, they can then be seperated and end up identical. A band saw or scroll saw is very usful to cut the parts out although a hand fret or coping saw or scalpel would do.
If the wings built up i recomend using a wing jig which are very easy to make mine is similar to the one in the link except mine has 1/4 steel pianio wire instead of aluminium arrow shafts.
http://webpages.charter.net/rcfu/Con.../WJConstr.html
To use drill two 1/4" holes in the ribs with a pillar drill, if you havn't access to a pillar drill make a template to ensure the wholes in each rib are in the same place, mark on all the spars the position the ribs go, thread the ribs on the jig and assemble. As long as the ribs are all in the right place on the spars it can't really go wrong except you need to make sure the wing as w hole os squared up or at whatever angle its supposed to be.
Simon