Born in El Morell, Tarragona, Catalonia, Garriga moved to Lleida in 2012 to study for a Physical education degree, and joined Segona Catalana side Club Atlètic Alpicat.[2] He was a part of the squad which achieved promotion to Primera Catalana during the 2015–16 season, but was sidelined for the most of the campaign due to an injury.[3]
In 2017, after graduating, Garriga was planning on going to a trip to London to improve his English, but went on a trip to New Zealand instead, after a recommendation from Xavi Padrones, a former teammate.[4][5] Initially as a tourist, he subsequently lived in a hostel and worked for a cleaning company before studying in an English school. In December 2017, as his English skills improved, he worked as a waiter.[6]