One thing at a time. If you take your time, you can learn a lot fast.
First learn what is going on with the browser. And how to drag things in from it. The manual will be helpful if you get lost.
Then practice dragging things into the slots in the 'Session View' and learn how to play and stop them. This works great with audio clips. Don't worry yet if they don't sound good, just figure out How to make them go.
Spacebar is a quick shortcut to make the whole program stop or play!
Lastly, in the browser is the instruments and fx section.
In instruments, pick out one of the Racks. You can double click it and it should pop up in your set.
Sometimes Ableton Live arms a track right away when you open it, and pressing keys will let you play the instrument. (If not, look up info on how to use the Mute, Solo, Arm buttons)
In Preferences, go in the MIDI tab. Your controller might show up in the bottom section. Make sure the stuff for it is On.
When you tap keys, to see if Live is seeing the code being sent, on the top Right of the screen, little squares will light up.
Hopefully this gets you started! If you can do all this, I will be happy to give you more things to try out
If you can't get the midi controller to work, you can also use your Qwerty. Turn on the Keyboard looking button on top of the screen and asdfghjkl will play notes in tracks that have synths that are armed.