changing order of pages in list of pages

hi everybody.
i’m not a skillful code writer, but i imagine what i want is possible to do, and i hope someone knows how to help me.
i have a page in my website that shows a list of all of the pages in it. the code in it’s center goes like this:

<h2><?php _e('Pages', 'hemingway'); ?></h2>
<ul class="pages">
<?php wp_list_pages('title_li='); ?>
</ul>

here’s a link [it’s in Hebrew]:
https://ms.somethingperverted.com/links/

here is what i want:
1. currently the list shows pages according to their order number, and i want to reverse the list. i want it to show newest pages, or pages with a larger number first, and older pages, or pages with a smaller number last.
2. currently the list shows all of my pages in the same list, and i want it to split the list to different pages. i want it to show only 15 pages at a time, and a “previous / next” button in the bottom, for lists of older or newer pages.

if anyone knows how to do it, i’ll be very thankful.
thankS
:-]