Expand scope of Apache Arrow sprint (#1468)

Author: rok

src/content/sprints/apache_arrow.md

@@ -6,12 +6,20 @@ contactPerson:
   name: "Rok Mihevc"
   email: "[email protected]"
 links:
-  - title: "Apache Arrow"
-    url: "https://github.com/apache/arrow"
+  - title: "List of good first time PyArrow contributor issues"
+    url: "https://github.com/apache/arrow/issues?q=is%3Aissue%20state%3Aopen%20label%3Agood-first-issue%20label%3A%22Component%3A%20Python%22"
+  - title: "Python development guide"
+    url: "https://arrow.apache.org/docs/developers/python.html"
+  - title: "C++ development guide"
+    url: "https://arrow.apache.org/docs/developers/cpp/index.html"
   - title: "Proposed donation of pyarrow-stubs"
     url: "https://github.com/apache/arrow/discussions/45919"
 ---
 
-We want to add type annotations to the PyArrow project. We will sprint to
-identify best approach to do so by prototyping. Suggestions and discussion also
-welcome.
+If there's a feature you want, documentation that you could improve, a bug that
+bothers you or if you'd just like to open your first PR for PyArrow come join us
+(Alenka and Rok) and we'll help you pick an issue and open a PR.
+
+Additionally - we want to add type annotations to the PyArrow project. We will
+sprint to identify best approach to do so by prototyping. Suggestions and
+discussion also welcome.