Hello,
1) To show the load more button follow theme docs and make sure that you added correct selectors https://xstore.helpscoutdocs.com/article/65-woocommerce-infinite-scroll-and-ajax-pagination-settings If you want to have just simple pagination disable WooCommerce Infinite Scroll plugin.
2) You need to select options before add product to cart. If you want to show the options in the quick view you may enable the Variation swatches https://youtu.be/XO-PDvhPypc In other way will have just select options button in the quick view.
Regards
