Add a CTA sentence to learn more

Author: olgahryniuk

site/docs/overview.md

@@ -43,4 +43,6 @@ The key idea is to separate transaction ordering (which occurs on the base
 chain) from transaction diffusion, availability, and validation. Ultimately,
 these multiple lanes must merge into a single, orderly flow of vehicles – just
 as the blocks of the underlying main chain consolidate transactions into a
-final, agreed-upon sequence.
+final, agreed-upon sequence.
+
+*Read the following sections to learn more about the protocol’s properties and high-level architecture.*