docs(starter): document how to include plain APKGs

README.md

 # Brand spanking new Anki Pack
 Hi, do you want to build a new Anki pack? You can start with this repository!
 
+If you want to learn, not create new content, see the user guide in
+[English](https://gitlab.phaidra.org/kartenaale/getting-started-with-anki/-/blob/main/GUIDE.md)
+or
+[German](https://gitlab.phaidra.org/kartenaale/getting-started-with-anki/-/blob/main/ANLEITUNG.md).
+
 ## First-time setup for a new project
 Create a
 [new project](https://gitlab.phaidra.org/projects/new?namespace_id=2286#import_project)
@@ -19,13 +24,23 @@ _Visibility, project features, permissions_. _CI/CD_ under _Repository_ should
 be _enabled_. Customize Merge Requests and other settings to your liking (
 _Pipelines must succeed_ is highly recommended).
 
-## Importing the pack to your phone
-Open the [releases section](-/releases) and click _Browse all APKGS…_.  There,
-click an APKG, download it, and import into Anki.
+*Everything below this point is not starter-project-specific, you may want to keep it*
+
+## Importing the pack to your phone or PC
+Open the [releases section](-/releases) and click _Browse all APKGS…_ on the
+newest release. There, click an APKG, download it, and import into Anki.
+
+If you are completely new to Anki and feel a bit lost, check out the user guide
+in
+[English](https://gitlab.phaidra.org/kartenaale/getting-started-with-anki/-/blob/main/GUIDE.md)
+or
+[German](https://gitlab.phaidra.org/kartenaale/getting-started-with-anki/-/blob/main/ANLEITUNG.md).
 
 ## Contributing
-To add new content to this pack, add subfolders to `content/` with a
-`.apkg-spec.yaml` file in it, and data in the form of CSV, images or APKGs.
+To add new content to this pack, either add `.apkg` files in the root next to
+`content` to include them unchanged, OR add subfolders to `content/` with data
+in the form of CSV, images or APKGs and an `.apkg-spec.yaml` file that
+configures which HTML too use for the cards and how your data is laid out.
 
 You can use the content in the starter template as your basis or just have a
 look to see how it works:
@@ -37,9 +52,9 @@ with your changes and open a merge request. Check the APKGs in the CI/CD build
 job on the MR and if you are happy, merge to main.
 
 ### Releasing a new version
-Bump the version number in `package.json` and merge the pull request.
+Bump the version number in `package.json` in your merge request.
 
-A new release will be created in the [releases section](-/releases) of the
-project and the kartenaale whatsapp group will be notified (if you go to the
-CI/CD job and link with your Whatsapp to send out the notification - restart
-the job if necessary).
+When your changes land on the main branch, a new release will be created in the
+[releases section](-/releases) of the project and the kartenaale whatsapp group
+will be notified (if you go to the CI/CD job and link with your Whatsapp to
+send out the notification - restart the job if necessary).