This appears to be governement software for Serious People doing Serious Work so I'm guessing... not very.

Shouldn't be too hard, the tool is designed to be intuitive. That said, it may not be obvious how to use the planning part of the tool if you're not familiar with trains.

The README contains instructions to start OSRD with docker-compose, if you want to try it out. Would be nice to have a public demo instance for sure!