On the English keyboard (which is somewhat different to the US Keyboard) you get "^" with Shift 6 (number 6, not function 6) - unless you have a Mac, in which case I can't help.
When you start Mathematica, you get command Tabs starting with File, Edit, Insert, etc. to the extreme right there is Help, which has a search function.
I am not familiar with Wolfram Alpha, being a "beginning beginner" myself ..
