That’s the full website copy treatment, baby!
You’ll find a copywriter you love, meet with them several times, hand over a bunch of information on your website metrics and customers (like testimonials and other feedback), take them to meet your team. It’s a relationship. It’s a process that will likely take place over the course of several months.
If you hire a conversion copywriter, their job will continue after the “final” approved copy is in place. They’ll make sure everything is working the way it should, with testing and validation.
It’s not cheap, but it’s worth it when you’re ready.