Hello,

You are Most Welcome.

1) Please try adding the following Custom CSS for that.

.cart-actions .button[name="update_cart"] {
    color: white;
    background-color: green;
}

2) Please try adding the following Custom CSS for that.

.woocommerce-message {
background-color: orange;
}

3) Sorry but we do not provide paid customization services. We provide only support within our policy frames, if you need additional customization you can find a developer or try to contact our partners https://wpkraken.io/?ref=xtemos.studio

Best Regards.