Help modifying Cassiopea a bit

[netphoto2139]

I am moving from Joomla 3.10 to Joomla 5. I am wondering how to modify the stock template either removing the blue banner across the top of the page or make it white and turn the text that is in that banner from white to a not-underlined black. Please bear in mind that I am not a code writer although I have done some simple html and css... any help, advice or instructions would be greatly appreciated.

Thanks

[carlitorweb]

Do you have a link to your website we can see the current status?

[carlitorweb]

While you are on it, a good start is here: https://cassiopeia.joomla.com/help

[netphoto2139]

Thanks for getting back - this is just the start of the test site and nothing close to what would be the production site - dalthaus.net/test5