To be honest, a Diploma in Mass Communication will not land you a job right away as a Travel Host. You might have to start it first assisting someone and then grasp the nuances of the trade. Experience matters. For someone to invest in your travelling and covering your stories, you should bring something different to the table than the rest. For starters, you need to have spontaneity, sense of humour and the ability to connect with your viewers. You need strong grip over the local language, culture, cuisines, tradition, history, etc. Any employer will want to see your work. So start may be recording local places near you until you get a hang of the nature of the job. Slowly you can develop your skills and make it big. Please remember, Rome wasn't built in a day.