Reply to Suggestion in buying equipment for starting DJ.

Hi guys this is my first post in this community and im really looking into learning Djing i just recently bought a laptop for it(Lenovo Y410P with backlit keboard and very good specs!).Now i was saving for the s4bundle with the midifighter 3d and 1 x1 mk controller. but seeing that the s4 is out of stock and apparently is not coming back again... i was believeing what to do... should i just buy and s2 to start learning or wait for what NI is bringing out? and also any suggestion where should i start on this learning process would be greatly appreciated!

Greeting from Colombia.