feat: update properties page

Author: sarahhaggarty

docs/topics/basic-types.md

@@ -1,7 +1,7 @@
 [//]: # (title: Basic types)
 
 In Kotlin, everything is an object in the sense that you can call member functions and properties on any variable.
-While certain types have an optimized internal representation as primitive values at runtime (such as numbers, characters, booleans and others),
+While certain types have an optimized internal representation as primitive values at runtime (such as numbers, characters, and booleans),
 they appear and behave like regular classes to you.
 
 This section describes the basic types used in Kotlin:
@@ -12,12 +12,12 @@ This section describes the basic types used in Kotlin:
 * [Strings](strings.md)
 * [Arrays](arrays.md)
 
-> [Learn how to perform type checks and casts in Kotlin](typecasts.md).
->
-{style="tip"}
-
 To learn about other Kotlin types, such as `Nothing`, `Any`, and `Unit`, look through the Kotlin API reference:
 
 * [`Any`](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-any/)
 * [`Nothing`](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-nothing.html)
-* [`Unit`](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-unit/)
+* [`Unit`](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-unit/)
+
+> [Learn how to perform type checks and casts in Kotlin](typecasts.md).
+>
+{style="tip"}