Given that you have a MathWorks.com account, the easiest way to get started with MATLAB is already freely available to you: MATLAB Onramp at MATLAB Academy . This is a quick (~2 hrs), highly interactive intro training. You get a guided tour through the basics of MATLAB, trying it out as you go.
This should give you a good idea of what MATLAB can do for you. It will also show you what our online training is like, if you want to go further -- depending on your school's license set-up, you might already have access to all our courses (and, if not, academic pricing is low, so you might be able to get someone to pay for it for you). One thing you'll notice with our training is that we don't assume a lot of math or programming background.
Good luck and enjoy your journey! (MATLAB is a lot of fun.)