On a small model - it sounds like your real problem is the old standby-- not enough speed and or too much weight.
If the canard is working and the CG is anywhere near where it should be - the nose will easily lift when speed is correct
There are no aerodynamic fixes for overweight
None
Zip
NADA
Negatory
I once sugested that if the model weighed too much - the CG did not matter
Still true and to further explain-
if the plane can not reach proper V1 ( takeoff speed) - it still does not matter .
If possible re setup power for max thrust
and set CG exactly per plans -but don't add any weight!!