Improve speed score on my Shopify store

I am looking for an experienced freelancer who can help me improve the speed score on my Shopify Store. I'm not sure how to go about this, so an overall optimization of my website would be greatly appreciated. I'm not sure which specific pages or elements are causing the most significant slowdowns, so help in identifying these would be very helpful. I prioritize image optimization, code optimization, and third-party app optimization when it comes to improving the speed of my website.