Make venv usage more explicit

README.md

@@ -15,6 +15,14 @@ for differing hierarchical linking.
 If you want to try this on your local machine, please take note that you will need to
 do the following:
 
+### Install requirements
+After setting up and activating your
+[virtual environment](https://docs.python.org/3/library/venv.html),
+install the requirements for the project:
+```
+pip install -r requirements.txt
+```
+
 ### Get Submodule
 Get the [catalogue](https://labs.onb.ac.at/gitlab/labs-team/catalogue) module by executing
 ```
@@ -22,9 +30,3 @@ cd catalogue
 git submodule init
 git submodule update
 ```
-
-### Install requirements
-After setting up your venv, install the requirements for the project:
-```
-pip install -r requirements.txt
-```