Need advice on diversifying

Currently 21, living in Syd. Over the past 8 months I have built my portfolio to 10k, a number which I am proud of. However, as around 80% of my portfolio is invested in US Tech. So yeah, I clearly need to diversify

I have been looking into VDHG as I think I would like to Vanguards auto invest and just forget about it. Although I have also seen many people regret the etf due to its investments in bonds.

I am looking for a high growth etf I can just put 1k a fortnight into and forget about.

Would love some advice, cheers everyone.