Many careers require that you have some sort of professional degree, but gaming isn't one of them. A degree in something related to broadcasting or social media might help, but it definitely isn't required. In fact, you can start streaming from a young age and start building your following while still in school.
What helps most, however, will be:
1. Practice: Just start doing it and be open to learning. Practice often, figure out what works, and develop your abilities.
2. Get the right gear: You don't have to get the most expensive mic or computer, but having the proper gear to create a positive experience for your audience is a must.
3. Join a gaming community: Reach out to other gamers and join their online communities. Here you can network, get pointers, and grow as a gamer.
4. Interact with your viewers: Becoming a pro gamer requires that you have an audience who is excited to see you. Interact with your viewers, get to know them, and make them feel welcome so that they keep coming back.
5. Get sponsored: Getting brands to sponsor you will help you establish a steady income so that you can focus on gaming.
6. Develop your brand: Having a memorable brand will ensure people know who you are and what to expect from you.
7. Be entertaining: People are tuning in to be entertained, so focus on giving them the experience they're after.