Bravo has signed a four-year deal with the Catalan club and will link up with the Blaugrana after the World Cup, moving for a fee in the region of €12 million.
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"I'm relaxed," he added. "But these things help boost confidence ahead of what is an important game for me and for the team [against Brazil]. It has been a long time coming, with constant news and phone calls, but it has happened now and I am looking forward to it."
The 31-year-old was scouted by Barca because of his shot-stopping prowess, but also due to his ability to play with his feet and act as the last defender when needed - a feature of his game for Chile.
"A lot of the time I play as a defender," he said. "I have to use my feet a lot. A lot of teams play fast football now and you have to be able to deal with that."
Bravo will compete with fellow summer signing Marc-Ander ter Stegen at Camp Nou next season.