Need to build a half wall/ fence need some ideas…

[Cuppa]

I reckon you should have put brackets in before laying the pavers. Maybe you'll need to lift pavers & bolt some stirrups (or brackets) to the concrete & possibly need to cut the pavers around the bracket, or cut circular holes in the pavers & then fill the hole around the stirrup with concrete up to the level of the top of the pavers? The bottom of the post will then sit just above the paver with no risk of rotting out over time. I reckon having the stirrups on the edging would look look naff. You could use a mix of rectangular (rather than square) posts (ie 90 x ??) & if needed to get the aesthetic balance right either some thicker battens to attach the Colorbond too, or spacers attached to the posts to attach the battens to.

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Crap drawing but hopefully you get what I mean. I'm sure there are plenty of alternatives but this is what I came up with. Just that I wouldn't choose to bolt to the pavers. I suppose you could drill right through the pavers into the concrete & use longer bolts? It'd be easier than what I've drawn.

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