Like Omar said, it shouldn’t be a problem! You will just need to decide how you want to mirror it. If you are using a modifier, you’ll have to find the proper order to place the mirror modifier so it mirrors the correct information. Order of operation matters for modifiers!
If you’re just going to mirror the final model after you have applied everything, make sure to check that your normals aren’t flipped. This will cause you some serious issues with baking and displaying textures, so you’ll want to save yourself the headache now if you can! We look at displaying normals direction in our final optimization video later in the series. 🙂