WordPress Website Clean Up

I need a quick clean up/fix up of the WordPress-based website. It's a simple website with a few pages and WooCommerce with around 10 products. The task requires an intermediate level of proficiency in WordPress and WooCommerce. Mobile experience and loading speed is important, so I will look to someone to do needed image resizing etc. Open to use of any theme which would be simple and pleasant to an eye (however would prefer to keep the original color scheme)