Shopify Store Speed Optimization

My Shopify store's lighthouse report indicates that the overall website speed is poor. I'm looking for an expert who can help me improve the loading speed of all pages including the home page, product pages and the checkout page.

Key Requirements:
- Comprehensive analysis of all areas affecting the website speed
- Implementation of necessary changes to enhance loading speed
- Experience with Shopify and its various custom features or apps

Ideal Skills:
- Shopify Store Management
- Website Speed Optimization
- Troubleshooting Custom Features or Apps
- E-commerce Knowledge

Please note that I do have several custom features and apps installed on my store, so the ability to troubleshoot and optimize these is crucial.