Did you get the trial version?
I suggest you get the student version and continue learning to model. You're doing great so far.
I had AutoCad and advance AutoCad classes (which were colledge credits ) in high school and because of that I got ALL of student versions of the program. I was a huge fast learner at it and I finished days before the rest of the class. After a year of college I got tired of waiting and cracked open the Maya and watched one tutorial video. After watching it I got an idea of the basics and made that model. Only problem is I learned I'm am better at constructive criticism than I am at tutorials. So I rather need a class or someone to quickly teach me about the tools.
Depending on what version you use, things can be named differently so older tutorials can be very outdated. I use Maya 2013 still since I know where most things are and I seem to get less crashes from it. If you have a lot of patience then just press F1 while in Maya to get everything about it, bit by bit.
I don't know how much you've learned so let me just go through the basics before going through the advanced stuff.
Q - neutral mode
W - move
E - rotate
R - scale
F - moves your camera to focus on the selected object.
Great to know when you make complicated curves:
B - switches between soft selection and hard selection and can be edited on how smooth you want the falloff to be on the left column.
Hold B + click and drag mouse 1 (left click) - it changes the radius of the fallout scale
Alt + B - changes to different set of colored backgrounds
Ctrl + A - Brings out the sidebar to the right which is used usually to edit objects and rename meshes
Quick tap spacebar - changes view modes. Hover the mouse over the window you want to switch to and quick tap spacebar again to switch to it
Ctrl + spacebar - hides everything to get a more clean workspace. Press the same command again in order to go back to normal
Hold down spacebar - (for advanced users) Opens up the entire menu selection. It's easier and faster once you get more familiar with Maya
Look for this menu if you don't know where to find extrude, split polygon tool, bridge, etc. and just search the name and press enter:
I can write stuff all day, but it won't stick unless you try things out on your own and experiment. If there is something specific you're trying to find out then just ask, but mostly it goes faster by just googling it or checking the "Maya Help" menu bar.
The best advice I can give you though is to always save constantly in a new separate file every time you're about to or have done something major. On some files I've gotten over 30+ versions just in case I need to go back and grab something I liked better in the previous versions. It saves time. A lot of time...
I hope it helped.