My biggest piece of advice is to not be sad after 'bad' assessment marks especially in prelim, as it does not matter, and as for eraly entry, I find that lots of ppl stress about it buts it's lowkey pointless as most of the early entry offers are conditional and still require you to do well on HSC exams
Chem -85% 1/29
Eng - 80% 6/49
Geo - 93% 1/7
Maths 2U - 88% 4/32
Maths 3U - 75% 4/8
Modern - 82% - 2/19
I felt happy, but I don't go to a very highly ranked school (rural) so take that with a grain of salt.
I have improved in most of my subjects excpet 3U in y12 (68% but idc because it's my 11th unit)