The Catalan opening is very rare and occurs in less than 1 in 1000 games. From the data, you can expect that White will have a 49.4% chance of winning, while Black should have a 50.6% chance of winning. Even though most players have probably never seen this opening (so you can catch them off guard), the edge that Black has is small (less than 2%). It is probably not worth it to study this variation, since as Black, the edge you gain isn't that great.