You are always a Catholic once you are baptized as a Catholic. You may not be a practicing Catholic at this time, but you are still a Catholic.
Please sit down with a priest and get your questions answered.
You most certainly can denounce Catholicism. It’s not the mob.
I have to disagree with that...I was baptized Lutheran and when I married a catholic, they wouldn’t let us marry at the center altar unless I became catholic and they baptized me, just in case my Lutheran baptism was not done according to the church...(priest told me this) I was Lutheran long before I was catholic, being baptized at 12 because I ask to be...once a catholic always a catholic is not even biblical...