Здрасте, есть вопрос, может кто подсказать, как всё это подключить

в wordpress через файл functions

<!-- datepicker -->
<link href="https://cdnjs.cloudflare.com/ajax/libs/bootstrap-datepicker/1.8.0/css/bootstrap-datepicker.min.css" rel="stylesheet"/>
<link rel="stylesheet" type="text/css" href="https://cdnjs.cloudflare.com/ajax/libs/bootstrap-datepicker/1.8.0/css/bootstrap-datepicker.standalone.min.css">

<!-- select picker -->
<link rel="stylesheet" href="<?php bloginfo ('template_url') ; ?>/css/bootstrap-select.min.css">

<!-- media -->
<link rel="stylesheet" href="<?php bloginfo ('template_url') ; ?>/css/media.css">

<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/popper.js/1.12.9/umd/popper.min.js" integrity="sha384-ApNbgh9B+Y1QKtv3Rn7W3mgPxhU9K/ScQsAP7hUibX39j7fakFPskvXusvfa0b4Q" crossorigin="anonymous"></script>
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0/js/bootstrap.min.js" integrity="sha384-JZR6Spejh4U02d8jOt6vLEHfe/JQGiRRSQQxSfFWpi1MquVdAyjUar5+76PVCmYl" crossorigin="anonymous"></script>

<script src="https://cdnjs.cloudflare.com/ajax/libs/bootstrap-datepicker/1.8.0/js/bootstrap-datepicker.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/bootstrap-datepicker/1.8.0/locales/bootstrap-datepicker.ru.min.js" charset="UTF-8"></script>

<script src="<?php bloginfo ('template_url') ; ?>/js/datepicker_footer.js"></script>

<script src="https://code.jquery.com/jquery-3.2.1.slim.min.js" integrity="sha384-KJ3o2DKtIkvYIK3UENzmM7KCkRr/rE9/Qpg6aAZGJwFDMVNA/GpGFF93hXpG5KkN" crossorigin="anonymous"></script>

<?php if(is_page('311')){ ?>
<script type="text/javascript">
$(document).ready(function() {
$('a[href^="#"]').click(function(){
//Сохраняем значение атрибута href в переменной:
var target = $(this).attr('href');
$('html, body').animate({scrollTop: $(target).offset().top-30}, 800);
return false;
});
});
</script>
<?php } ?>

<script src="https://code.jquery.com/jquery-2.2.0.min.js" type="text/javascript"></script>

<!-- mixitup -->
<script src="//cdnjs.cloudflare.com/ajax/libs/jquery/2.1.3/jquery.min.js"></script>
<script src="https://cdn.jsdelivr.net/jquery.mixitup/latest/jquery.mixitup.min.js"></script>

<!-- select picker -->
<script src="https://cdn.jsdelivr.net/npm/bootstrap-select@1.13.9/dist/js/bootstrap-select.min.js"></script>



<script async="" src="<?php bloginfo ('template_url') ; ?>/js/slick.js"></script>
<script async="" src="<?php bloginfo ('template_url') ; ?>/js/main.js"></script>

<?php if(is_page('192')){?>
<script async="" src="<?php bloginfo ('template_url') ; ?>/js/loadmore.js"></script>
<?php }?>

https://wp-kama.ru/function/wp_enqueue_script