Is there a way to hook into WooCommerce BEFORE item is added to cart

Solution:

The best resource that I’ve found for woocommerce hooks is actually the repository itself, they have incredibly well commented code that is very readable.

https://github.com/woocommerce/woocommerce/blob/master/includes/wc-template-hooks.php

I’m sure a solution exists for the problem you’re trying to solve in one of these sections:

/**
 * Product Add to cart
 *
 * @see woocommerce_template_single_add_to_cart()
 * @see woocommerce_simple_add_to_cart()
 * @see woocommerce_grouped_add_to_cart()
 * @see woocommerce_variable_add_to_cart()
 * @see woocommerce_external_add_to_cart()
 */
add_action( 'woocommerce_single_product_summary', 'woocommerce_template_single_add_to_cart', 30 );
add_action( 'woocommerce_simple_add_to_cart', 'woocommerce_simple_add_to_cart', 30 );
add_action( 'woocommerce_grouped_add_to_cart', 'woocommerce_grouped_add_to_cart', 30 );
add_action( 'woocommerce_variable_add_to_cart', 'woocommerce_variable_add_to_cart', 30 );
add_action( 'woocommerce_external_add_to_cart', 'woocommerce_external_add_to_cart', 30 );


/**
* Cart Actions
*
* @see woocommerce_update_cart_action()
* @see woocommerce_add_to_cart_action()
* @see woocommerce_load_persistent_cart()
*/
add_action( 'init', 'woocommerce_update_cart_action' );
add_action( 'init', 'woocommerce_add_to_cart_action' );
add_action( 'wp_login', 'woocommerce_load_persistent_cart', 1, 2 );

If you continue to have issues leveraging the above action hooks feel free to throw me a few more details and I can try to walk you through. Good luck!