llwvc on "Modify Twenty Fourteen Child Theme Single.php"

I need to create a child theme for the default Twenty Fourteen theme. And in this child theme, I need to modify the single.php.

This is the default single.php:

get_header(); ?>

    <div id="primary" class="content-area">
        <div id="content" class="site-content" role="main">
            <?php
                // Start the Loop.
                while ( have_posts() ) : the_post();

                    /*
                     * Include the post format-specific template for the content. If you want to
                     * use this in a child theme, then include a file called called content-___.php
                     * (where ___ is the post format) and that will be used instead.
                     */
                    get_template_part( 'content', get_post_format() );

                    // Previous/next post navigation.
                    twentyfourteen_post_nav();

                    // If comments are open or we have at least one comment, load up the comment template.
                    if ( comments_open() || get_comments_number() ) {
                        comments_template();
                    }
                endwhile;
            ?>
        </div><!-- #content -->
    </div><!-- #primary -->

<?php
get_sidebar( 'content' );
get_sidebar();
get_footer();

I now need to do two things:

First, Add some sharing buttons in my post. The codes for these buttons are

<div class="bdsharebuttonbox"><a href="#" class="bds_more" data-cmd="more"></a><a href="#" class="bds_qzone" data-cmd="qzone" title="分享到QQ空间"></a><a href="#" class="bds_tsina" data-cmd="tsina" title="分享到新浪微博"></a><a href="#" class="bds_tqq" data-cmd="tqq" title="分享到腾讯微博"></a><a href="#" class="bds_renren" data-cmd="renren" title="分享到人人网"></a><a href="#" class="bds_weixin" data-cmd="weixin" title="分享到微信"></a></div>

<script>window._bd_share_config={"common":{"bdSnsKey":{},"bdText":"","bdMini":"2","bdPic":"","bdStyle":"0","bdSize":"16"},"share":{},"image":{"viewList":["qzone","tsina","tqq","renren","weixin"],"viewText":"分享到：","viewSize":"16"},"selectShare":{"bdContainerClass":null,"bdSelectMiniList":["qzone","tsina","tqq","renren","weixin"]}};with(document)0[(getElementsByTagName('head')[0]||body).appendChild(createElement('script')).src='http://bdimg.share.baidu.com/static/api/js/share.js?v=89860593.js?cdnversion='+~(-new Date()/36e5)];</script>

Second, Add some variable from Advanced Custom Fields in the post. The codes are like:

<p><?php the_field('field_name'); ?></p>

I don't know where to add these codes. I tried to insert theme between some lines, but that causes the theme to stop working.

Please help! I need to where to add these lines of codes.

Thank you so much.