Good point, nordskoven, but that’s only part of it. Being Catholic is not just about knowing doctrine. Knowing the essential doctrine of being a Christian is important, but it’s not all there is to being Catholic – one must live their faith too which includes active particiaption in the liturgy and being around Catholics.
I wasn’t suggesting merely toe-dipping, but an immersion of sorts in a Catholic community.
To me, it’s one part doctrine, one part participation.