Display featured products through custom loop in woocommerce on template page

I would like to display 6 featured products from my woocommerce store on my home-page.php template. After some researched I found that the right way to do this was through a custom loop,( I do not wish to use shortcodes because I would like to add additional classes for styling etc. ) I also found that the key that woocommerce uses for the featured products is ‘_featured’. I put together the code below to display any products that I chose to be featured products in my store, but it doesn’t work… Any help is appreciated.