In the quote from Stephanie Perkins' book "Isla and the Happily Ever After," the speaker conveys a sense of having numerous thoughts and stories to share. It highlights the overwhelming feeling of having so much to say but not knowing where to start. This reflects a common experience of wanting to express everything at once but being unsure how to organize those feelings.

The quote emphasizes the importance of beginning and the challenge that comes with wanting to share everything at once. It suggests that sometimes, the best approach is to start somewhere, even if the full story feels too big to tell initially. The message encourages taking the first step towards sharing, despite the uncertainties or the magnitude of what is to be said.