opencart website bug fixing

I want to fix bugs on my running website on opencart platform. below are the points which need to be resolved. website needs to be Updated on latest Version of opencart Need web/zip compression of website bug fixing of 2 Times loading of website SSL Certificate installation HSN and GST (IGST, CGST, SGST) extension installation Shipping of order according to weight basis URL Correction as per the SEO compliance SKU generation of product canonical tagging of similar product(e.g, resistance) Image Optimization of Website bug fixing of CSS and js related problem of website Browser caching expiration (not specified) error need to be fixed Complete information of customer need to extracted in excel format Tracking activity of customers on website Email Customization Like Amazon seller account (like welcome, transaction email, shipping, etc) customer can track the shipping status on our website . URL variatations Google analytic installation and validation on required area Google webmaster integration with website bug fixing of page speed and error customization of tax invoice as per India govt rule. design responsive website for mobile and desktop view