Your misalignment is probably no big deal. I've flown a few models with that problem, and unless you're talking precision aerobatics it's most likely no problem at all. A minor imperfection, let's call it. If it were really bad, what you'd notice is a tendency to roll one way or another when you apply elevator.

I would fly it first, and see if it's a real problem. If you don't like the way it flies, then you can probably shim the wing on one side to bring it into alignment with the stab. Doing this will probably introduce a bit of misalignment in incidence between left & right wings, but some precision aerobats have a deliberate differential incidence between the two wing halves, so don't let that prevent you from flying it.

Also, your plane does not have to fly at full throttle all the time anyway. Full throttle should be reserved for climbing and vertical maneuvers; otherwise, ease it back to about 1/2-2/3 for straight & level. (And back off to idle when you're on a down-line.) Whatever misalignment your plane shows in flight will be at its worst at full throttle, so throttling back will reduce any ill effects and improve your flying pleasure otherwise as well.

Next time you build or assemble an ARF, first thing is to get the wing square to the fuselage and perpendicular to the vertical stab. Then get the horizontal stab square to the fuselage and parallel with the wing. Not to worry, go fly and enjoy.