There are many paths taken to become a competent glass blower. Some learn from friends & family and through practice, sweat, hard work and a bit of luck they are making glass vases, vessels and paper weights.
An alternative route is to take courses from your local glass studio. There you will learn about the tools, studio set up, health and safety, how to gather molten glass of the hot furnace, how to add colour and blow vessels. The most importance benefit of taking a local course to to gain instance feedback from a teacher and to also learn with fellow students.