Adding collection banner images on home page; editing banner on collection page

Can’t seem to find any solutions that work for me for some reason. I’m using the Minimal theme and I’m trying to:

1. Add and center a banner image to replace the text header above my collections on the home page.
I want to replace the circled red text headers with a centered image.

2. Change the collection page so that it doesn’t include the text header or collection image, but displays, shrinks, and centers the banner image.

I used the below code to get the banner image, but it’s too large – I’d like it resized smaller and centered. I also want to get rid of the text "New Arrivals :sparkles: " header and collection image to the right of it. All I want visible is the banner image and the sorting menus below it.

{% if collection.image %}
  
{% endif %}
![collection1.JPG|1346x1269](upload://lNPsazO6Q4cZ9NyYr6xCYXG9EAG.jpeg)

Thanks in advance for any advice!