Like others have mentioned, we can't give much tailored feedback until you provide your store's URL.
In the meantime, I'd recommend taking a look at our in-depth optimization guide: How to Optimize a Shopify Site: Complete Guide to Faster Load Speed. It can help walk you through some common optimizations if you'd like to handle those in-house.
I'd also recommend running your store's URL through the Shopify Analyzer (free analysis tool our team built for the Shopify community). It'll provide some actionable insights into what could possibly be optimized on your site.
Please feel free to reach out to our optimization team at speedboostr.com/contact if you need any more help