you're still pretty young lol you have a lot of time. but entry for year 10 and 11 is very hard compared to entry to year 9. saying that, youre clearly on your way to getting good reports, so if you just do more extracurricular, and practice hard for the edutest, I'd say you can get into james ruse, however like try to win some grand award of some sort like a writing competition, maths competiiton, science competition, even a sports competition is fine. for the interviews, i know for year 10 entry and year 11 entry, its like 10/25 people selected so like lets say 25 people get chosen for the interview, 10 students get in. note that these numbers are just an example not actually how many people get in. for the interview, i'd say theres no harm in hiring a tutor for llike 2-3 weeks to improve your responses, but it can be a little costly, so you can watch interview courses for free like tedx etc.
id say though that some transfers have quite a hard time adjusting to the like lifestylel of ruse, like what i mean is the academic flow and competition, so getting in in year 10 would be optimal than year 11, because i know theres a much lower success rate of year 11's in ruse than year 10's. not a lot of year 11 transfers i know have performed well in our school, except for the few who are kinda like overachievers since the very beginning of their high school career. id say dont slack off if you do get in, because thts a mistake many ruse transfers make (senior transfers).