indeed i do.

komacro or fun15, both for 15 (ish) engines and micro gear.

i got the idea that you might be talking about a pprofile model, if so, you want ply at the front for mounting the engine, balsa around the wing and tailplane mounts and then sticks for the rest of the shape, then-sheet the lot, itll be very very stiff with all the mounting points underneath the sheeting.

by the way, you said you are new in rc airplanes, if you mean you have no previous experience then the best idea is to get a trainer.
much as your design looks eminently workable and good, its no trainer.