100k- first time investing looking for advice

Hi all ,

Im looking for advice on my specific situation , as a precursor I’ve never had ETF but understand the basics of extra super contributions and how it would reduce my taxable income

Currently have

100k in HISA

PPOR paid off - 700k value

135k super

145k income

34yr old

Interested in either going towards ETF via DCA or even maxing super contributions or both - has anyone got any experience which would be a better path for a 20 year plan

TIA