I'm planning to buy an electric in ~1 year, but now, I only have an electro-acoustic. I was thinking of buying an AX3G which I would use later with my electric.

Could I use it with my current guitar, or is it meaningless to buy it now?

I think you'd be able too, im guessing the AX3G has a few nice clean setting's that you could play through for the acoustic feel.

Also when you plug it into an amp/ effect's pedal it's pretty much like an electric guitar.

It should be ok to use.r
Black Knight CF-60F Semi-Acoustic.

Black Knight CP200 (Red flamed maple).

Neck-thru 4 string bass.

Acoustic 6 string.
Thanks for the fast reply!

Also, does this work as a pre-amp also? Could I be able to connect it to a normal amp?
It will work. It will also work as a preamp. Although you have a preamp in your guitar already.