Hello.

1. Add this code:

<style>

.btn-proceed-to-order:hover {
background-color: #000 !important;
}

</style>

Here:

You can find out a little more about adding code here https://aleksius.com/en/incomedia-website-x5/css-and-js-adding-to-website-x5

If you do not see changes on the site, please clear your browser cache. Perhaps before this it is worth uploading the entire site to hosting, and not just the changes.

2. The answer is the same as for 1.

3. The order completion message should appear almost immediately. As far as I understand, this depends on the speed of request processing by the server (hosting). Perhaps it was a temporary delay.

#000 is the background color. You can specify a different color. The color code can be found, for example, here https://htmlcolorcodes.com/

Hi Aleksej, how to add shoping card to the sitemap creation , i cant to see it here 

At the bottom of special pages, click on the shopping cart, then while holding down the mouse button, drag the shopping cart symbol upwards, with the mouse on the left edge of the sitemap so that the marker for insertion appears.

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Hi Daniel , do you know how to add "shopping cart" icon to header , like on picture attached

There is also a paid shopping cart symbol (12 Crediits) that shows the number of items, see

>> https://market.websitex5.com/de/objekte/1600384e-1fb4-41e0-93bf-9c8136b633

And here the guide in English, see

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Cart Status Object. How to view cart data

>> https://guide.websitex5.com/en/support/solutions/articles/44001801585

Hello George G.. You may find these video tutorials useful.