Recently I did a little study in Relatics, a System Engineering tool. This allows you to manage and organize complex projects, creating work breakdowns and organization hierarchies. You can create project structure in it and can even link documents, like PDFs, IFCs etc.
Relatics is based in the Netherlands but used all over Europe. Unfortunately, it’s not open source, but I think when you ask them to get a trial as a student you will get one.
Since there are not really any tutorials to find online, I am uploading my studies work, which is a report about how to create a system engineering concept as a functional designer, and also how to use the structure as an end user. As an example, I have chosen a one-family house project. Check it out on our BILT Academy Slack environment.