wp question – WP_Query, Paginate by Customized Area

I will preserve this quick. I am new to PHP and having a tough time understanding one of the best pagination practices for WP_Query.

(I have gotten pagination working, however solely by posts_per_page.)

Naturally I might prefer to paginate by a customized date area, however being unable to take action, have opted to $_GET parameters to vary the meta_query_args second array key worth to date('Ymt', strtotime('+1 month'))

$meta_query_args = [
    [
        'key'     => 'starting_date',
        'value'   => date('Ymd',strtotime("today")),
        'compare' => '>',
    ],
    [
        'key'     => 'ending_date',
        'value'   => date('Ymt', strtotime('this month')), // This changes to ('+1 month')
        'compare' => '<=',
    ]
];

$args = array(
    'post_type'     => 'publish',
    'posts_per_page' => -1,
    'category_name' => '',
    'orderby' => 'meta_value',
    'order' => 'ASC',
    'meta_key' => 'starting_date',
    'meta_query' => $meta_query_args,
    'paged' => $paged,
);

// Button appends $_GET
if (isset($_GET['next_month'])) {
    $meta_query_args[1]['value'] = date('Ymt', strtotime('+1 month'));
}

After all, this solely works as soon as. Is there a approach to retailer the worth elsewhere for incrementing? Or actually paginate by customized fields? (Or extra like meta queries I might say).

I’ve performed hours of analysis, however really feel I am nonetheless lacking one thing. Possibly utilizing pre_get_posts? I want an excellent kick in the appropriate path. I am feeling fairly defeated. Trying ahead to your steering, cheers.