Docs: How to access Grafana in fundamentals tutorial (#88488)

* Docs: How to access Grafana in fundamentals tutorial

* All pretty, no pity

* note on login

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Co-authored-by: tonypowa <tonypowa@gmail.com>

docs/sources/tutorials/grafana-fundamentals/index.md

@@ -110,6 +110,21 @@ To add a link:
 
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+## Open Grafana
+
+Grafana is an open-source platform for monitoring and observability that lets you visualize and explore the state of your systems.
+
+1. Open a new tab.
+1. Browse to [localhost:3000](http://localhost:3000).
+
+{{< admonition type="note" >}}
+This demo does not require a login page or credentials. However, if you choose to install Grafana locally, you will need to log in and provide credentials. In that case, the default username and password is `admin`.
+{{< /admonition >}}
+
+The first thing you see is the Home dashboard, which helps you get started.
+
+In the top left corner, you can see the menu icon. Clicking it will open the _sidebar_, the main menu for navigating Grafana.
+
 ## Explore your metrics
 
 Grafana Explore is a workflow for troubleshooting and data exploration. In this step, you'll be using Explore to create ad-hoc queries to understand the metrics exposed by the sample application.