A great to start shooting as a photojournalist to start working locally!
Of course, you will need the proper equipment to shoot these types of subjects. Whatever photo equipment you can afford is what you should start and grow as you get better with your technique.
Shoot your local news/sports/events in your area. As you get better handle on these types of subjects, you will begin building a portfolio of images that you can use to show off your work. You will need to create an online portfolio that you will use to promote your work.
You can then try submitting your images to local news sites and potentially start working as a freelancer photojournalist. Remember if this your dream job, then go out and start shooting and practicing everyday!