Odds of Getting In
It depends on how you define in. Getting into an art trade fair's pretty easy; you can have your rickety, wobbly pieces of blown glass shown as long as you front the booth money. Someone may even buy one (thanks mom).
But the odds of being a professional glassblower who makes a livable wage are not nearly as friendly as your neighborhood craft fair. The glass industry may handle materials that are super-hot, but job prospects here are downright chilly.