avoid mixing warning with instruction

README.md

@@ -40,16 +40,22 @@ See [the community guidelines](coc.md) to understand the conduct that is expecte
 
 # Installing Haskell
 
-## DO NOT INSTALL HASKELL PLATFORM
+## Use Stack to get going with Haskell
 
-Instead of following the instructions on Haskell.org, get [Stack](haskellstack.org) to get GHC installed and to build your projects.
+Get [Stack](haskellstack.org) to get GHC installed and to build your projects.
 
 If you don't know anything about Stack and would like an overview, check out this [comprehensive Stack video tutorial](https://www.youtube.com/watch?v=sRonIB8ZStw).
 
-## Why not platform?
+
+## Also, DO NOT INSTALL HASKELL PLATFORM
+
+Instead of following the instructions on Haskell.org, get Stack.
+
+### Why not platform?
 
 https://mail.haskell.org/pipermail/haskell-community/2015-September/000014.html
 
+
 # How should I learn Haskell?
 
 The core recommendation is to read the lectures and complete all exercises/homework for the Spring 13 version of cis194 followed by the NICTA course. Both are linked below. Everything else can be considered optional and is mentioned so you know where to look.