Anyone here who does Programmatic SEO?

Hey guys, anyone here do Programmatic SEO?
So, I am a little new to Programmatic SEO and I need some suggestions from you.
Firstly:
I know my long tail keywords, but how do I extract the variable?
Is there any tool that can take care of this process?
Secondly:
Are there any website builders that can take care of hosting all the pages?
Thirdly:
Content, I was wondering if the content can be mass-generated by AI and slowly edited by a human to ensure quality, again, is there any tool for this?
Lastly:
Am I missing a step? If so, what?
Thank you