Hey just wanted to let you know! I was able to achieve my desired result with this code!
// Set a minimum amount of order based on shipping zone & shipping method before checking out
add_action( 'woocommerce_check_cart_items', 'cw_min_num_products' );
// Only run in the Cart or Checkout pages
function cw_min_num_products() {
if( is_cart() || is_checkout() ) {
global $woocommerce;
// Set the minimum order amount, shipping zone & shipping method before checking out
$minimum = 75;
$county = array('CH','LI');
$chosen_shipping = WC()->session->get( 'chosen_shipping_methods' )[0];
$chosen_shipping = explode(':', $chosen_shipping);
// Defining var total amount
$cart_tot_order = WC()->cart->subtotal;
// Compare values and add an error in Cart's total amount
// happens to be less than the minimum required before checking out.
// Will display a message along the lines
if( $cart_tot_order < $minimum && in_array( WC()->customer->get_shipping_country(), $county ) && $chosen_shipping[0] != 'local_pickup') {
// Display error message
wc_add_notice( sprintf( '<strong>Sie haben die Mindestbestellmenge von €%s exklusive Versandkosten noch nicht erreicht. Geringerer Bestellwert ist nur bei Selbstabholung möglich.</strong>'
. '<br />Ihre derzeitige Bestellmenge ist: €%s.',
$minimum,
$cart_tot_order ),
'error' );
}
}
}