To the op, you're unsure if you're either a judger or perceiver? Judgers usually like structure and order. They make their enviorment adapt to themselves. Perceivers are more flexible. They observer first, and judge later. They adapt to their surroundings.
If you like order, and structure, don't like surprises, and like too know what you're getting yourself into, you are probably a judger.
If you like to keep things open, enjoy surprises, and don't enjoy sticking to a routine, you are probably a perceiver.
This can be used as an indicator at times. However, and in particular for the introverted types, this isn't quite consistent enough. That being said, it's a good starting point. This really comes down to Pi character and Pe character. The former is a J type, the latter is a P type.
Pi in general wants to intake information and centralize it into a meaningful whole. In a sense, it is convergent. It starts at a fringe, and intakes information from that point. It then seeks to connect it to something else that could be closely related, or not closely related to it, and draw a pattern and parallel from it. This continues until the initial starting point is condensed down into a general principal. You could think of it as inductive reasoning. Starting at the details, and working to the general. These are the J types.
Pe in general wants to diversify and make something as broad and understanding in sweeping sense as possible. Pe character is divergent. It starts at some point that has a general meaning and principal. It then seeks to find something that has some relation to it. It goes further out and see what's related to that. In a sense it is puddle jumping away from what the inital idea was, but it's not totally forgotten. Pe seeks to gain as many perspectives from this inital thought so that way there is a later detailed understanding. In a sense Pe is deductive reasoning. Going from the general, to the specific. These are the P types.
Because Pi character in general seeks to
centralize the information that is taken in, they are seen to be focused individuals. They always seem to have this sense of always remaining on track, and they always refer back to where they started, and they always see where they want to go with things. Despite this being a perceiving function, it is later filtered through a Je function, which determines the J/P axis. Because of this focus, and desire for clarity and centralized information, Pi is seen as structured, ordered, and order seeking. Depending on if it is Ni or Si will determine the light it is seen under. In the end, this lends to classic J type behavivor, even in the intake of information.
Because Pe character in general seeks to
diversify the information that is taken in, they are seen as much more free flowing individuals. Pe individuals always seem to have this sense of never leaving an option unconsidered. They seek to find all the possibillites and all the imediate options that could be used. Because of this, they tend to seem to follow their own path, and seem to lack any disernable structure to what they are doing Pe in itself locks the P axis in place. Their desire to understand an intake is driven by finding out anything that could be used in some way, no matter how related it is the inital thought. This this is classical P behavior that is often see in P types, in particular ExxP types. For IxxP types this is seen less externally, but is felt more internally.
Hopefully that helps some. This is a good starting point for seeing which one axis you work on more. Keep in mind though, that for ExxJ types and IxxP types this might feel a little less "distinct" for you, and you might feel more elements of both due to them being at auxillary/teritary posistions.