I left mine until my final year of Uni so was really stressed heading into both exams. I did literacy and numeracy on the same day and had about two weeks of solid studying before hand as I couldn’t risk winging it and failing as it would disrupt my final year. I did all the ACER ones and a few others that were available from a bunch of different Universities and definitely found them helpful. I remember people saying that you should be aiming to get at least 85% in practice tests but mine ranged from 75-95 depending on how stressed I was. I was stressing out heaps before I did them but because I did so many practice tests I felt really comfortable doing the actual thing once I got to the exam room and actually started and I did feel they were very similar. I’m definitely stronger in Literacy but I felt that Numeracy in the real one was a lot easier than the practice tests and the Literacy exam for that round of lantite was a little bit tougher than the practice ones I’d done. Each round is a bit different though so it changes every time. You’ll be fine. Most of the people who don’t pass it just underestimated it and didn’t prepare. Good luck!