Improving my Shopify store speed

I am an e-commerce store using Shopify and looking to improve my mobile speed score to increase conversion rate. I have been able to compress images, but am not skilled in the following:

– Remove unused JavaScript
– Reduce initial server response time
– Eliminate render-blocking resources
– Enable text compression
– Remove unused CSS
– Minify CSS

The above are PageSpeed insights from Google which are effecting the speed. I have attached a screenshot of the issues that need looking into.