Alguien sabe si aún puedo inscribir a mi hijo a catesismo, por favor.

You need to speak to the church office to ask. You need to call the church to inquire if they have Catechism classes available.

I think it's already full But you can call the office for catechism and ask for Marta She can give you more information

He thought the places are full, but just in case he can get to the office of religious education.