A lot of agencies have their own internship schemes or ways of entry, look into Ogilvy’s The Pipe, and Wieden and Kennedy’s The Kennedy’s. They’re the first that come to mind but there’s a lot more out there, take a look at If You Could Job’s sister company, Creative Lives in Progress, it’s opportunities board is really good.
I would also recommend searching different companies and looking for people in the role your after, or are working somwhere you would like to know more about. Don’t be afraid to reach out and just ask for 15 minutes of someone time because nine times out of ten people will give you that. Be really intentional, say you like the company they worked for, or you saw a piece of work they did and wanted to learn more.
Continue to try and learn more about the industry too. Read trade press like Campaign Magazine, Marketing Week and Creative Brief. They’re also good publications to see interesting work and learn about different hires etc.