How can I improve image quality and adjust layout with Dawn theme?

I am working on finishing up my store and implementing the pictures to my webpage and also having some layout flaws. I am using the Dawn free theme and when I am uploading my picture to the banner, in the edit admin panel, it looks clear and crisp, then in the preview (what other people will see) it looks significantly more blurry. How can I fix this?

I also would like to move the head text more to the left, how can I do that?

In the footer, I would like the social media icons to appear under the quick links section, is that possible? How?

Is it possible to center my products in the middle of the screen as opposed to left side? How?

Is it possible to center the “subscribe to our emails” box to the center as well but still underneath the other boxes? How?

Is there a way to add more spacing to the boxes, some of the text almost overlaps. How?

https://glad-youre-here-b5e8.myshopify.com/

There is the link to the preview of my store. I am sorry for all the questions at once and hope they are simply answerable.

Yes you can make the changes you’re asking. You’ll have to make edits in the code as you won’t be able to do all that from customizer.

And also your store is password protected so if you can post the password here so I can check it out.

Hi, thank you for your reply. My password is: aweaya

@SimonSmith , sorry for the late reply. But then what you’re asking for can be done. But if you dont have coding knowledge then you’ll have to give collaborator access to a developer to make those changes for you.