Link description for creating merge requests

CONTRIBUTING.md

@@ -81,12 +81,18 @@ As for VSCodium, render your document with `<CTRL>+<SHIFT>+V`
 
 ## Publishing your File
 
+
+### First time publishing a topic and no GitLab experience
+
 Choose whatever you feel comfortable with: You can forward your topic.md to me via
 
-* Mail (see below, not elegant but simple)
-* TUHH-cloud (check your mails for the link) (still not elegant but simple)
-* GitLab merge request at:  https://gitlab.com/fabiangabel/research-topics-mat-tuhh  (not as simple but elegant)
+* Mail 
+* TUHH-cloud (check your mails for the link) 
+
+### If you have already published something and want to modify your existing files
 
+* GitLab issue/merge-request at:  https://collaborating.tuhh.de/cfg0846/research-topics-mat-tuhh  (the preferred way)
+* See this description and contact Fabian Gabel (see below) if you need assistance: [https://writemd.rz.tuhh.de/s/bZESwieQR](https://writemd.rz.tuhh.de/s/bZESwieQR)
 
 ## Contact