It's extremely hard to tell but since 90% of your subjects are low scaling you are probably looking at something between high 60s and mid 70s.
English standard is low scaling and you did poorly in it and having a bad cohort would scale you down considerably (including your overall ATAR)
I don't think there is any problem with them wanting to pursue academic endeavours. But occasionally it is questionable if the celebrities paid their way into prestigious universities because that I would be pissed about. They wouldn't be trying to upstage their public appearance but they would...