HUGE jump from a trainer to a Cap.... May be a bit more of a jump than is wise.

Its not just that its a low wing, or a tialdragger... Higher power to weight ratio, differnet wing design (going from flat bottom rectangular to symetrical tapered) and the much larger control surfaces with shorter moment arms means the plane will be MUCH more responsive.

You can partially overcome the snappy characteristics by having the CG forward a bit. Typical for the Cap would be close to 32% MAC, go with about 25 to 27% MAC (move it forward about 1/2 inch) This will degrade aerobatics some... but its just a shift in battery location to do it... so the CG can be moved as you get used to the plane. (and your skills improve) Tape about 6 inches of 1/4 inch triangular stock to the center LE on each side of the fuselage, and the center will stall earlier. (reduces tip-stall tendancy.) Again... reverseable.

It would be BETTER to fly something similar to a 4*40 before flying the Cap... Take a smaller step in aircraft performance, which will aid you in gaining flying skills and it will mean you'll have less problems long term.