Expanding my ETF for more stability

I started at the last quarter of last year and started of with $VUSA (+0,3%) now this year i want to expand my ETF’S for more stability any advise ?

I was personally thinking to add these to my portfolio: $SPPW (+0,3%) or $IWDA (+0,2%) , $SPYI (+0,23%) , $VWRL (+0,27%)

any feedback is welcome