I tried adding the <script>...</script>
in the <header> tags of the blog, but it still doesn’t load the button until after the entire page has completely loaded.
I’m not sure I understand the concepts of the php codes and register and enqueue exactly, so I’m hesitant to give that a try.
Also, when other wordpress.com users visit my site and I have Jetpack already, why is it not possible for me to have a +Follow button on the bar on the top of the blog? And is there any other alternative to that so wordpress.com users can easily subscribe to my blog?