I'm a Data Officer too. I mostly work on assessment tracking and reporting and analysis but used to work in this school as an SEN Admin so I know a fair bit about that area too. We're lucky in our LA as our support package includes all you can eat training courses (for now at least) so I've been on as many as I could tenuously link to my role to further my knowledge of the software as a whole.
I've lurked on here for ages having found the place when googling for SIMS help, it's a brilliant resource.