If you study modern astrology then Moon can rule occupations such as: baker, cook, fisherman, gardener, janitor, maritime worker, nurse, obstetrician, restaurant worker, waiter, etc.
In traditional astrology Moon isn't one of the planets of Mastery (only Mercury, Venus, and Mars). If it's strong it can mean working with the hands, maybe construction. I like to look at Moon in connection with other planets. Sometimes it tells a story. Yours could indicate work with some traveling involved.
It's not so much friends that I compete with but just anyone that I happen to be close to. I'm very competitive by nature, and it's hard for me to associate with someone and not compare myself to them in some way. Sometimes that inclination to compare is bad and sometimes it's good because it motivates me to do better, etc. I think that other people's accomplishments/skills/talents make me hyper-aware of what I do or don't have, and so I want to compete to 'boost' myself, so to speak. The more innocent side of it is that I just love competition in general so I'd probably engage in a lot of 'friendly' competition whether I felt happy with myself or not.
This is a good example of what Robert Hand talks about in Horoscope Symbols re: Libra. He writes:
"Being the sign of the simplest of all relationships, the one-to-one, Libra has difficulty in thinking of other modes of relationship. It sees in terms of polarities: I versus you, this person versus that person, we versus they. And very often for "versus" one may substitute "together with". The key idea is that Libra cannot conceive of self in a vacuum. Self is developed only in connection with another self......Libra needs the juxtaposition of itself to another in order to develop self-understanding and self-realization."
And yes, I absolutely do feel a need to assert my individuality within friendships. I hate feeling like I have to tell white lies or go along with other people just to be "friends" so I think I've stalled a lot of friendships by arguing a lot and not making efforts to emotionally solidify the relationship. I think my attitude towards past acquaintances/friends has always been "take it or leave it" because I hate feeling like I need anyone. The problem is that it ends up driving people away (with the exception of maybe 1 or 2 people) because they think I'm arrogant or, in some cases, naive.
Your Mercury trines the MC and that could have something to do with the need to express your own point of view and ideas, being objective, and being extremely mindful of your own direction in life.
Your chart fits everything you are describing about yourself in this thread. Saturn squares your Asc-Dsc axis and that can indicate a strong independent streak too. Saturn does push relationships to the backburner. It's just not important to you.
I'm curious about something. Moon is above the horizon in your chart so this may not be the case.....but do you have a history of any asthma/bronchial issues? Moon in opposition or square to Saturn could indicate that, especially with the Moon in the 1st.
Cheers!