Congrats you lucky thing! B)
I would put layers of thickish cardboard under the stand (we have a cupboard) to level it up.
It acts like a sponge so evens it out as well as raising the front (presuming it is the front that needs raising?)
Also make sure you have some support for the tank itself. Any imperfection in the glass will be stressed and will break the tank if you do not have an even surface for the tank to sit on....
We use polystyrene ceiling tiles underneath ours
Good luck....
Let us know what you decide to put in it (marine fish wise)