omg hiii!!! Some great places you can go to are CSIRO! I got offered this one where you (if I recall correctly), build a high-performance computer (but this is online work experience), so that one's pretty good (they also offer some other ones as well so go check it out). There's also some work experiences offered at uni, such as a data science work experience at UNSW (I think this one is offered through schools...but double check with your school for this) and that was one pretty nice. There's this website
https://studyworkgrow.com.au/work-experience/ and there's a lot of great work experience there. Make sure you get one as soon as all the spots fill out. If your parents work at a computer sci/se firm, you could try go there as well?