The brief reads: join, notice it is badly run, take responsibility for it
If this had a brief it would read: join a group, observe within a fortnight that it is being run badly, and then take responsibility for fixing that without anybody having asked you to or offered to help.
The Capricorn half of this is common material across a whole span of birth years and rebuilds structures from inside them; the eleventh house, decided by your birth hour, is what points it at friendship, community and collective life. So the thing you keep giving a structure to is other people's attempts at organising themselves.
You can make a voluntary group actually work
Given a collection of people with good intentions and no arrangements, you can put in the structure that makes it survive: who does what, what happens when somebody leaves, how decisions get made. Almost nobody will do this work. It is why several things in your life exist at all rather than having quietly folded.
The office becomes the reason you are there
Having taken on a function, you now attend because of the function rather than because you want to be there, and the pleasure that brought you originally has been gone for some time. It is a common trap and an unnecessary one. Handing the role on while you still like the group, rather than when you are exhausted by it, is the version that keeps the friendships.
People rely on you and do not include you
The group depends on you structurally and relates to you as the person who handles things, which is a position rather than a friendship. That distinction is invisible until you need something. Asking one of them for help with something entirely unrelated to the group is the test, and the result tells you what you actually have.
Arrangements that outlive the founders
What builds here is what voluntary groups almost never get: a structure that keeps working after the people who set it up have moved on. A fair process, a sane constitution, a standard that protects whoever is least powerful in the room. That is a real contribution and it deserves to be named as an objective rather than carried indefinitely as a habit.
You are the officer, not the member
In every circle you have a function, and belonging without one is a category of experience you have almost no data on. Attending something with nothing to do in it will feel pointless. Doing it anyway, three times, is the only way to establish whether the discomfort is about the group or about being unemployed inside it.
What you hope for is measured in decades
Your ambitions are long, specific and mostly unstated, and you have been working towards several of them since before anybody else in your circle was planning anything. That patience is a genuine advantage. Its failure mode is that the target keeps moving, so setting an actual date by which something counts as achieved is worth doing while you can still enjoy reaching it.
You met them through the work
Relationships here tend to begin inside something you were organising, which means the person saw you competent before they saw you at all. It is a good foundation and an odd one. Making sure they have met the version of you that is not in charge of anything, early, is worth arranging deliberately, because it will not happen by itself.
Your friends met the competent version first
Almost everybody in your life encountered you in a role before they encountered you as a person, which means the friendships were built on a foundation of you being capable. It is a solid basis and a narrow one. Letting one of them see you handle something badly, without immediately correcting the impression, is what widens it, and it takes considerably more nerve than any of the organising does.
You subsidise the thing and call it participation
A group you are responsible for is quietly being kept afloat by you: the shortfall covered, the equipment bought, the year somebody could not pay. Nobody has been told, because telling them would change the atmosphere you are trying to protect. It has now been going on long enough to be structural. Setting a ceiling, privately, is the difference between generosity and an obligation nobody voted for.