What does the "verbs not nouns" idea mean to Hamish McKay?

He applies it to his own future: for the next five years he's going to be writing, but he's not a writer — he's just writing at the moment. His post-exit dream is to spend his late 20s to 30s, hopefully financially free, doing a postgraduate masters in creative writing, tackling the scary challenge of writing a novel, and maybe making income telling stories on the internet through a YouTube channel. Part of being human, he says, is to evolve over time, and he likes never putting himself in a box.