The clutch was replaced a year ago, but it started giving me trouble shifting into first gear.
Hello. It is not normal for your clutch to have problems after being replaced a year ago. The cause of this is most likely due to a failure of the slave cylinder. There are other less common causes for the trouble you are experiencing when shifting into first gear. A certified technician, like one from YourMechanic, can diagnose your shifting issue and pinpoint what repair would need to be done.