You're dropping nickels all over the place! (Score 1)

I see lots of buzz words, but they don't make much sense together. Big Data and a Data Warehouse are not the same thing. If you *only* care about big data, you don't need to care about ETL. All of these things require you to know your data (and to have a goal). Its one of those things were the execution is a lot more important than the product chosen. Your goal cannot be 'get into this "big data" thing'. I'd recommend finding some user groups for the tools you're interested in and asking a few other companies what they are doing.