add link to Nim Basics in tut1.rst [ci skip]

doc/tut1.rst

@@ -17,9 +17,14 @@ Introduction
 
 
 This document is a tutorial for the programming language *Nim*.
+
 This tutorial assumes that you are familiar with basic programming concepts
-like variables, types, or statements but is kept very basic. The `manual
-<manual.html>`_ contains many more examples of the advanced language features.
+like variables, types, or statements.
+If you would like to have a gentle introduction of those concepts, we recommend
+`Nim Basics tutorial <https://narimiran.github.io/nim-basics/>`_.
+On the other hand, the `manual <manual.html>`_ contains many more examples of
+the advanced language features.
+
 All code examples in this tutorial, as well as the ones found in the rest of
 Nim's documentation, follow the `Nim style guide <nep1.html>`_.