Accommodation for the duration of your traineeship is to be organised and paid yourself. Contacting the person in charge of the halls of residence at universities in the appropriate cities is also a very good idea. That way you can often find inexpensive accommodation, where you will get settled into your new environment much faster.
Additionally we recommend the numerous internet platforms dedicated to find an accomondation. However you should refuse any payment in advance or deposit as long as you haven't seen the accomondation yourself.
Some companies and organisations offer also contacts to local landlords or even have own accommodation at your disposal. It is always worth asking them.