Most people think of writing the copy. Forget that. Copywriting is 80% "sales thinking" and 20% writing.
But most people aren't good writers. They get the "blank page" blues...
Here's what you can do instead. (If you can't afford to hire a copywriter)
Pretend you are sitting face-to-face with your prospective buyer.
Then give them your best sales pitch why you should buy. Just like an actual sales person would do to sell their product.
When you feel like you've got your best "pitch" RECORD that sales pitch.
Next have it transcribed and then edited for grammar.
Typically, this will give you much better results than trying to "write" copy yourself. Especially if you're not a seasoned copywriter.
The reason this works so well is because you are doing what a sales person would do in person. And then directly translating that to the written word.
Hope this helps.
[self-promotional blurb deleted]