My advice is dont learn the software, learn the technique and artistic skill. Then, you can adapt to any package.

While many studios may allow you to use your software of choice, in this case Maya, some studios may only use another, like 3D Studio Max, Lightwave, Softimage, Cinema 4D, or even there own non-commercial software.

Wouldn't you hate it if you get a great job but you can only good work in Maya and you find they only use Max.

While we all have our preference and may get to use them in your jobs (i dont know how common this is) you could end up shooting yourself in the foot by being too attached to one package.