I’m not going to be able to express this correctly, so I ask for help with articulation. Especially if it needs to be in a simple way. It seems that the minimum belief and acceptance would be all that you have come to learn through catechesis, scripture, self-study, and revelation of Church doctrine. So, the more you become cognizant of, then that now becomes the minimum standard. This might be deeper than you’re scratching at. So barring what I’m trying to say, I would think that the creeds, and the sacraments would be a bare minimum starting point. To believe in the words of the creeds, and efficacy and reality of the sacraments. But see, if one came that far, they would soon learn more, and would then be responsible for believing and having obedience to the new knowledge as it occurs. Can anyone explain this better? Can anyone pick up on what I’m even trying to say?
At any given time in your journey, there will still be a ton of doctrine you don’t personally know about. So the minimum would be what you know, and a faith that what you DON’T know isn’t going to violate the rightly ordered conscience. To trust with faith, hope and charity, the doctrines of the faith AS you become personally aware of them.
If this isn’t the kind of thing you’re after, then most likely and understanding and faith in the creeds, the seven sacraments, and apostolic succession.