Looking for a young adult/kids book series

This is a book series I read on the late 2000s. It’s about a boy who goes on a journey from his house and does crazy things. In one book he becomes a crew mate on a pirate ship. He has a piece of fudge in the beginning I believe. The book has a lot of illustrations that look like journal sketches. It was a series of books, they used British vocabulary, and I think the main character was named Charlie. Thank u in advance.

Edit: It was the Charlie Small Journal Series