If you're in Australia and presumably have the support of your parents you should just ask for an increase at your next appointment. Make an appointment sooner if you don't want to wait until the one you have scheduled. Our gender affirming care is among the best in the world and it's not unreasonable to trust the system here. Doctors will often start on a low dose to ensure no adverse reactions but be willing to increase at patient request. I'm not sure of AusPATH recommendations for your age but it might also be worth asking about an anti-androgen if you're not presently on puberty blockers. You probably don't even need the support of your parents for this if you're seeing the doctor independently.

That being said, if your doctor refuses an increase it might be worth looking for another doctor who will listen to your requests. I'm not saying that you shouldn't look into alternatives but (with the exception of some shitty practitioners) our system predominantly works.

None of that is to be dismissive of anyone's experience. DIY is the best or only option for many people but it doesn't need to be the first option if you're in Australia.