Being confirmed at your church does not mean you accept their unorthodox practices. You are receiving a sacrament that does a holy work within you. Confirmation, like baptism, imprints a spiritual mark on your soul, something you can receive only once in your life (CCC 1317). It’s the sacrament that gives you the fullness of the Holy Spirit, increases and deepens baptismal grace, and incorporates you more firmly into Christ (CCC 1316).
The Catechism of the Catholic Church also says,
Every baptized person not yet confirmed can and should receive the sacrament of confirmation. Since baptism, confirmation, and Eucharist form a unity, it follows that "the faithful are obliged to receive this sacrament at the appropriate time," for without confirmation and Eucharist, baptism is certainly valid and efficacious, but Christian initiation remains incomplete. (CCC 1306)