In 2016, he enrolled at the drama department of the Estonian Academy of Music and Theatre to study acting under supervisors Elmo Nüganen and Anu Lamp, graduating in 2020.

Notable stage roles at the Estonian Drama Theatre include Tomas Egerman in Ingmar Bergman's Private Confessions, Ragnar Solness in Henrik Ibsen's The Master Builder, Dom McGuire in Brian Friel's The Loves of Cass McGuire, and Michael in David Almond's Skellig.

The film, released in April 2022, was part of a trilogy, based on the popular Apteeker Melchior novels by Estonian author Indrek Hargla.

All three films featured Estonian Academy of Music and Theatre classmate Maarja Johanna Mägi and veteran actor Alo Kõrve.

[5][6] In 2023, Metsaviir joined the main cast of the long-running TV3 comedy-crime television series Kättemaksukontor in the role of Madis Toor.