Just a suggestion or recommendation for you. If you have built and flown a number of flying models then just ignore the advice but I would start into Foamboard by building existing designs first. Then after a few builds you could modify a few designs and finally build your own.
The reason I suggest this is that often a first build of a model can actually be a waste of money, Foamboard and time as not every thing that looks like a aeroplane will fly like the builder imagines it should. Many forum users start strong, struggle and give up. To have great success a fair bit of learning need to be done!
Just a suggestion!