i am not very religious (if you mean like going to church regularly and praying the rosary everyday then nope i’m not one of those people)
although i do pray everyday and on wednesdays i attend mass
basically there are different “branches” of Christianity, which all believe in the same thing, the Holy Trinity and that Jesus sacrificed his life for our sins, but the difference between the branches is how they interpret the Scripture, and the rituals/ceremonies, etc.
In other words they believe the same thing, but have different “opinions” on how certain things should be done.