Add Product Block to Sales Page WITHOUT the quantity box, JUST the button to ENROLL (pay)

Currently I have Enroll button(s) on my sales pages directing customers to the product/service page of my store so they can add the course to their cart, however, I would like to eliminate this step - hence the need to use a product block to direct customers straight to payment once they click on the Enroll button. However, I ONLY want the button (with none of the other options on the product block showing) so that I can customize the look of that section to fit with the rest of my sales page. 

When I've added the product block - eliminating the image, description, etc. - I am still stuck with the quantity dropdown box alongside the button. I'd like to get rid of this so that I can maintain the current aesthetic of the enrollment sections.

I'm a complete amateur when it comes to code, but see that there are ways to customize these types of things through using custom code... can anyone assist me in this?

If URL doesn't save above: https://www.katiedove.love/source-regulation

Thank you!

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Thank you Paul. I see now that the URL I had entered didn't save for some reason. I've gone in and edited my post and put the URL in two places. 

I can't see a Product Block on that page. Can you point it out for me?

I didn't put the product block on the sales page yet because I don't want the quantity box to show on the live site. 
The quantity box I'm referring to is like that in the screenshot I've attached. Also seen on the product/service page itself, here: https://antelope-squid-yxxm.squarespace.com/orders/p/source-regulation-enrollment

or click on the Enroll button on the previously referred to Source Regulation page and it'll take you to this product (store) page.

I added this product block to one of my hidden pages as I play around with how best to edit it