Currently there are no clubs around high-school however there are some programs that run at high school level.

You can check Microsoft student accelerator, this a programme designed for both high school and tertiary students. The aim of this programme is to deliver information and content around new technologies and tools to students. http://msa.ms

If you are planning to explore around AR, VR and MR than you should be looking to involved in tech future labs and AR/VR garage who run events around AR and VR (http://www.arvrgarage.nz/#top).