You can find plenty of courses on beginners, intermediate, and advanced levels; online, offline or hybrid; English or German on topics like

• parallelisation with OpenMP, MPI
• profiling and optimisation
• Machine Learning, CFD, Data Analytics and other application fields
• Programming languages C++, Julia, R, Python, ...
• ...

on the following pages. The announcements partly overlap, but it is worth to browse through all of them.

• PRACE, Partnership for Advanced Computing in Europe, with many partners
  https://events.prace-ri.eu/
• Announcements of NHR, National High Performance Computing, Germany
  https://www.nhr-gs.de/aktuelles/veranstaltungen
• Calendar of the Gauss Alliance, Germany
  https://hpc-calendar.gauss-allianz.de/
• Calendar at HLRS Stuttgart, also a few courses at other locations are listed
  https://www.hlrs.de/training/hpc-training

If you can recommend further web sites, please let us know: hpc@awi.de