I don't think you are bothering anyone here and @warkolm's answer is accurate.
We are happy to help on any specific question you might have but we can't really answer a so generic one which is basically "how do I move from a relational model to a document oriented model?" and "how do I move from a datastore to a search engine?".
One silly answer would be: just index each table as a new index. But you will see that does not work well with the search engine and document oriented paradigm.
So, you have to ask yourself some questions that I covered at: Which is the best way to index the data from relational database
Then, when you know more about your use case, features, data model, etc. we can help about sizing and other stuff. Feel free to ask.