VERY basic questions about footer design (problem with container height and cent

Hello, I'm sorry if the questions are too basic, but I can't solve it and I couldn't find any information in official documentation or forum

The first problem I have is that I can't make a white space at the bottom of the page disappear (screenshot 1).

I can make it disappear by occupying a lower padding in the container of that text BUT the result is very large (screenshot 2)

I'm working on a second footer (this footer will only be visible when the user browses the page's internal forums, it contains widgets with information), I have the same problem mentioned above, but also I can't vertically center anything (the block options don't seem apply, at least not the ones in the option when a minimum height is entered). Eventually I can simulate centering the text by force of padding but the result is too big

In private I am leaving the links, maybe they will help to better graph the problem I have

I apologize if it is too basic, I really want to continue learning, I greatly appreciate the help

Thank you !