Configure a Word Press theme / Add POP UP MAKER configure/ Connect to Convert KIT /

GOAL: Configure wordpress site to be elegant and as a platform to blog- gather leads from opt in pages for email marketing/ and to have prospects go to my shopping site.
Current site has new theme needs to be configured further.
www.sharonhay.arbonne.com I have included a screen shot of a site I like for shop button on header shot.

PART I - Change Background Header Shot – Design and Configure Pop Up Maker Widget with Email Provider Convert Kit:
Style Theme was installed – MOCK UP SITE IS BELOW and need configuration with my photo assets and configuration integration with Convert Kit.
MY SITE UNDER Maintenance and has different pictures and colors but the layout is
the demo theme I purchased as here: https://demos.restored316designs.com/style/
although I am not using all the widgets.
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Now this site is in Maintenace mode as you can see: the colors will need to be changed and would like advise on best color pick for my new header shot:
This site has the look and feel I am looking for. It may be possible to put a SHOP button on my header that leads to my shopping site: www.sharonhay.arbonne.com I have included a screen shot of a site I like for shop button on header shot- on the requirements doc.

I will need POP UP MAKER to be reconfigured; and colors changed on the background and so forth. There is a list of requirements docs. but I am unable to attach it here as the file size is too big. Please advise if this reconfiguration job is something your team can do and where I can send you list of requirements- if I can share a drop box? Thank you. Best, Sharon