Hedzig,

Your stab area is way way too large. We don't use stabs this large for several aerodynamic and manueverability reasons. If you are building a trainer, then a 32% stab is fine. Reduce the area to around 20-25% of the wing area. ...smaller area (20%) for all out F3A capability or larger area (25%) for more stability in pitch and groovier performance

You wing section at 9% is also fine. Try to get a taper ratio as close to 3:1 (tip chord 1/3 the root chord; 2.5:1 works well andmay be easier to make built up) as you can and still build the wings straight and flat.

1 degree of dihedral should be very close for as low as you show the wing relative to the thrust vector. We generally raise the wing a little and reduce dihedral for better rolling character and elimination of roll coupling with applied rudder

I like the general side view shape

MattK