Applied for ANZ Frequent flyer Black before becoming a Qantas member

Hi,

I got my wires crossed and thought that to sign up as a Qantas frequent flyer to earn points I needed to pay a membership fee and that this was $99 through Qantas or $50 through Anz, I now realise this is for their lounge membership and frequent flyer is free membership is free ><

I signed up for a ANZ Frequent flyer Black card and got approved last week, during the application I ticked No to being a qantas member, expecting that they would give me the option to sign up. I got the card today, I haven’t activated it but there’s no mention of signing up as a Qantas member in the letter..

I’m now worried I’m not going to be able to get my free 90,000 points

Should I sign up as a member via Qantas directly now before activating my card? And then will ANZ be able to link to that membership and I get my 90k points(after spending the 5k) or should I do it a different way?

Thanks!