Transfer shopify store from 1 theme to another

ONLY 1X PRODUCT WEBSITE - Current theme not suitable, most work done need to transfer the rest of few things. You must have knowledge of Graphic design because you willl be required to change few colours according to the new theme. Making sure the store speed maintains good.
current store is: www.ourtovo.com
New theme is : https://themes.shopify.com/themes/debut/styles/default/preview?surface_detail=debut&surface_inter_position=1&surface_intra_position=1&surface_type=search