How do I add call-to-action Buy Now buttons on various pages linking to my collections page?

[Steve_Hopkins]

I would like to add Buy Now call to action buttons in the middle of my home page and near the top of other pages.

How can that be done? And can the appearance of the buttons (color, style, etc.) be easily edited to match my theme colors?

https://www.hoppysgardenart.com/

Thanks!