SAP IBP server access may not be available for training or practice purpose to IBP trainees.
This is because IBP is still a WIP tool and it has not been released for training purposes.
The best way to learn IBP is to complete a Training from an experienced IBP consultant and join a project where IBP implementation is in progress.
We can help you engage with IBP experts and consultants who can guide you in your IBP journey.
SAP IBP is a very complex tool and it can be at most important to learn the tool accurately to leverage it effectively.