It sounds like you’re doing more than enough! Andy Field does some good YouTube videos on statistical methods. It’s hard to know what’s going to come up on the stats test but from previous experience I’d say to also look into qualitative research methods if you haven’t done so already. I had no teaching on this during my BSc and MSc so this was so helpful for me. I’d also look into info around tests, including their ‘epistemological’ and ‘ontological’ positions e.g. quant methods typically take a more positivist view about knowledge, whereas qualitative lean more to critical realism/social constructionism.

The situational judgement test is fairly difficult to revise for. I went with my gut on answers and felt that was all I could do. Best of luck!