Welcome to the forums!
As someone minoring in mathematical statistics and majoring in biology I approve of your subject choices
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Immunity was personally the toughest topic for me in bio - how are you finding it?
There's a fair few people from unimelb in the atarnotes community so if you have questions about that you should be able to get some guidance.
Sorry last question, how long will it take for a response approximately
(I wrote this before J41 posted so I'm just going to leave it in)
ATAR notes works off people contributing as they can when they can, so response time can vary a bit. E.g. if you post a 2000 word thing at midnight it'll probably take longer for you to get a response than something that's 500 words and posted at 4pm.
My skill set & experience is mostly in science; if you post bio, chem, or psych work I'll try to make sure you have feedback within 24 hours
Absolutely nothing to apologise for - you're welcome to ask questions