As suggested, try moving the battery pack back to adjust the C.G.

You may have to move it out of the provided space.

Now all of that said.

Because this plane has a nose flywheel, it does come out somewhat nose heavy.

If you've placed the battery packs and components where the instructions and the plane provides for, then

THERE IS NO PROBLEM WITH THE C.G.

That is, there is a purposely designed compartment for the pack and receiver.

Stick the battery pack in the battery compartment as shown and fly ( with an instructor! )

The plane does well this way and it is designed to fly like this.

Don't overthink the C.G. issue.

Later when you do remove the flywheel, you'll find that the plane will then balance out perfectly at the recommended C.G.... but save that until you are a more experienced and certified flyer.