There are no formal qualifications necessary to become a TV Presenter. However, there are accredited courses and training out there which can help you build your charisma and get you comfortable working in front of a camera.
Start looking for lower-level media production jobs. It can be difficult becoming a TV presenter right away, so look for jobs related to television production. Look for positions like camera operator, writer, editor, or production assistant so you can work on set and meet other people. This way, you grow familiar with how production works and see how other presenters behave professionally.