WordPress Website Redesign for Enhanced Engagement

It is a website that offers deals and coupons for different e-commerce website. Since we won't be making any changes to the backend or functionality, you must utilise the functionality or elements that are currently in place.
Your responsibility will be :
- Website Redesign: Apply a new design to make the site appear 'busier' and more engaging.
- SEO Optimization: Implement on-page SEO best practices to improve search engine rankings.
- Development needed for designing
- 100% all devices responsive
- Maintaining the page speed and GTMetrix quality score.

I want to avoid Elementor (which i am using currently using) because of heavy page load but still your suggestions are welcome.
I am open for ACF builder also.

******Max budget : $250 (includes Design + Development )*****

This is my website :
https://www.allstoredeals.com/

These are few references :
https://www.gorillacoupon.com/
https://www.grabon.in/