Additinal tweaks to the Orientation

Author: vdauwera

docs/hello_nextflow/00_orientation.md

@@ -5,14 +5,31 @@ However, you do need a (free) account to log in, and you should take a few minut
 
 If you have not yet done so, please follow [this link](../../envsetup/) before going any further.
 
-## Materials provided
+## Working directory
+
+Throughout this training course, we'll be working in the `hello-nextflow/` directory.
+
+Change directory now by running this command in the terminal:
+
+```bash
+cd hello-nextflow/
+```
 
-Throughout this training course, we'll be working in the `hello-nextflow/` directory, which you can load by typing `code hello-nextflow/` in the terminal when you open the training workspace.
-Otherwise you can change directory and go into this folder with `cd hello-nextflow/`.
-This directory contains all the code files, test data and accessory files you will need.
+!!!tip
+
+    If for whatever reason you move out of this directory, you can always use the full path to return to it, assuming you're running this within the Github Codespaces training environment:
+
+    ```bash
+    cd /workspaces/training/hello-nextflow
+    ```
 
-Feel free to explore the contents of this directory; the easiest way to do so is to use the file explorer on the left-hand side of the training workspace.
+Now let's have a look at the contents of this directory.
+
+## Materials provided
+
+You can explore the contents of this directory by using the file explorer on the left-hand side of the training workspace.
 Alternatively, you can use the `tree` command.
+
 Throughout the course, we use the output of `tree` to represent directory structure and contents in a readable form, sometimes with minor modifications for clarity.
 
 Here we generate a table of contents to the second level down:
@@ -61,12 +78,4 @@ If you run this inside `hello-nextflow`, you should see the following output:
   The name and number in the filename correspond to the step of the relevant part of the course.
   For example, the file `hello-world-4.nf` is the expected result of completing steps 1 through 4 of Part 1: Hello World.
 
-!!!tip
-
-    If for whatever reason you move out of this directory, you can always run this command to return to it (within the training environment):
-
-    ```bash
-    cd /workspaces/training/hello-nextflow
-    ```
-
-Now, to begin the course, click on the arrow in the bottom right corner of this page.
+**Now, to begin the course, click on the arrow in the bottom right corner of this page.**

docs/hello_nextflow/01_hello_world.md

@@ -12,6 +12,10 @@ In this first part of the Hello Nextflow training course, we ease into the topic
 
 Let's demonstrate this with a simple command that we run directly in the terminal, to show what it does before we wrap it in Nextflow.
 
+!!! tip
+
+    Remember that you should now be inside the `hello-nextflow/` directory as described in the Orientation.
+
 ### 0.1. Make the terminal say hello
 
 ```bash