4.4.4 customizing pagination links

Using default_full
pls can U help me change the pagination look, would like to replace first with '<<' , previous '<' , last '>>' , next '>' ?

Found a crude but easy way of doing this, probably not recommended:

With : ./vendor/codeignator4/framework/system/Language/en/Pager.php

Commented out original array and replaced with modified

Code:

<?php

/**
* This file is part of CodeIgniter 4 framework.
*
* (c) CodeIgniter Foundation <[email protected]>
*
* For the full copyright and license information, please view
* the LICENSE file that was distributed with this source code.
*/

// Pager language settings
/*return [
    'pageNavigation'        => 'Page navigation',
    'first'                  => 'First',
    'previous'              => 'Previous',
    'next'                  => 'Next',
    'last'                  => 'Last',
    'older'                  => 'Older',
    'newer'                  => 'Newer',
    'invalidTemplate'        => '"{0}" is not a valid Pager template.',
    'invalidPaginationGroup' => '"{0}" is not a valid Pagination group.',
];*/

return [
    'pageNavigation'        => 'Page navigation',
    'first'                  => '<<',
    'previous'              => '<',
    'next'                  => '>',
    'last'                  => '>>',
    'older'                  => 'Older',
    'newer'                  => 'Newer',
    'invalidTemplate'        => '"{0}" is not a valid Pager template.',
    'invalidPaginationGroup' => '"{0}" is not a valid Pagination group.',
];

q1 Can anyone please help with a more valid way of doing this?
q2 Is it possible to replace the text based links with icons / buttons ?
q3 Can somebody provide css on how to format links ?