Some additional details in main README.md

README.md

 # ClickHouse
+
 ClickHouse is an open-source column-oriented database management system that allows generating analytical data reports in real time.
 
-Learn more about ClickHouse at [https://clickhouse.yandex/](https://clickhouse.yandex/)
+## Useful links
+
+* [Official website](https://clickhouse.yandex/) has quick high-level overview of ClickHouse on main page.
+* [Tutorial](https://clickhouse.yandex/tutorial.html) shows how to set up and query small ClickHouse cluster.
+* [Documentation](https://clickhouse.yandex/docs/en/) provides more in-depth information.
+* [Contacts](https://clickhouse.yandex/#contacts) can help to get your questsions answered if there are any.
+
 
 [![Build Status](https://travis-ci.org/yandex/ClickHouse.svg?branch=master)](https://travis-ci.org/yandex/ClickHouse)