search it under you tube "djing with ableton" there are some ok tutorials there . you can see some examples of a sight called sonic academy. there web site is cool. you can just buy tutorials for little sections (say "djing in ableton") they are about 3 quid for each video.
but if you choose the right ones you should be able to learn how to dj for not much money.
me i was lucky. me mates showed me how to do it - i owe them alot x