How to get started? You need:
\begin{itemize}
\item \textbf{GHC}: this is the Haskell compiler
\item \textbf{GHCi}: this an interactive environment of GHC, similar to the interactive ruby shell \emph{irb}
\item \textbf{The Haskell Platform}: a collection including GHC, GHCi and basic libraries
\end{itemize}
Go to \url{https://www.haskell.org/platform}\\
For haskell IDEs, see \url{https://wiki.haskell.org/IDEs}