Did the camera come with digital photo professional cd or something? That's what I use with my t3i to correct white balance.
I first set custom white balance on the camera, I have white cards but prefer to take a pic of a yellowish wall so the pics come out more blue and closer to the real color. In my case if i do a straight white card all the pics look like they were taken in daylight.
When I have that set up, I then take the clearist pic I can and save it in raw. You can do full auto if you aren't familiar with the other settings.
I then upload the pics to my computer and use the supplied program to do any white balance corrections with the color wheel. If a pic is too blue you could move it closer to white, too green move it closer to purple. I've tried messing with lightroom but couldn't figure it out lol
This is how I do it and it kinda works. I can take a decent pic but not as good as some I've seen. If you got the program it could be a good place to start