Update root README.md

Added link to Getting started tutorial and link to create a Codespace.

README.md

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 # Learning about Drasi
-This repo contains code for sample applications that use Drasi as an end-to-end solution for change detection and real-time reactions. The applications will help you understand how to implement and deploy Drasi for different scenarios. Each app folder  within this repo has a README.md which details what the scenario for the app, code for the apps, requisite test data, and how to run the samples.
+This repo contains code for a tutorial and a few sample applications that use Drasi as an end-to-end solution for change detection and real-time reactions. The tutorial The applications will help you understand how to implement and deploy Drasi for different scenarios. Each app folder within this repo has a README.md which details what the scenario for the app, code for the apps, requisite test data, and how to run the samples.
+
+## Getting Started with Drasi
+#### Detect and react to your first database change using Drasi
+[This step-by-step tutorial](https://drasi.io/getting-started/) will help you get Drasi up and running quickly and show you how easy it is to create Sources, Continuous Queries, and Reactions.
+[![Open in GitHub Codespaces](https://github.com/codespaces/badge.svg)](https://codespaces.new/drasi-project/learning)
 
 ## Sample Applications
-This repo has the following applications in folders:
+Following sample applications demonstrate usage of Drasi in different scenarios:
 1. [Building comfort](apps/building-comfort)- Drasi for a building management scenario
 2. [Curbside pickup](apps/curbside-pickup)- Drasi for a notification service to alert drivers when orders are ready for pickup
 3. [Fleet POC](https://github.com/drasi-project/learning/tree/main/apps/fleet-poc)- Drasi for an efficient solution to translate vehicle telemetery into actionable insights for Connected Fleet scenarios