Urgent Shopify Theme Setup Assistance Needed

I've recently acquired the CarMe theme from HasThemes for my Shopify website. While I'm quite excited about the theme, I'm facing a challenge with setting up the search filter section, dont know how to add categories on each field and also cant find out how to change the home page, the theme originaly gives you the option to choose between diferent home pages, however can i bought and import theres only 1 home page, cant figure out how to select the home page of my choice. I'm in need of an experienced Shopify expert to assist me in its configuration.

Key requirements include:
- Assistance with setting up the search filter section on the CarMe theme
- Assistance on how to change the home page
- Provision of insights and guidance on the best practices for its configuration

I'm looking for a professional who is well-versed with Shopify and its various themes, particularly the CarMe theme from HasThemes. It's essential that you're able to provide a quick turnaround, as I'm hoping to have this project completed at the earliest.

This is the demo theme where i bought it: https://shorturl.at/eegxt
And this is my site: https://687f2a-15.myshopify.com/

Attached you will find images of what im trying to achieve

Your expertise and prompt assistance will be greatly appreciated.