Hi loveNlive
I think the Moon in the 12th is a big influence in life! It's so wonderful to hear that someone else out there has shared this journey in some ways. It's really powerful to be able to proactively work on your inner world instead of just passively feeling it -which is the most comfortable/ miserable approach -to Moon in the 12th. I think the reason why there is so much talk about being selfless and helping others with this placement is that it is an anecdote to self pity and victim-hood. I think you can tell if your 12th house is on lower vibration energy if you are feeling sorry for yourself, or as though life has been unfairly hard on you. I'm thinking that helping others is just one of many ways (along with training your mind) to escape the 12th house trap. See the positive, or even neutral in life. There is a beautiful Yeats poem that I always think of in this regard:
Beloved, gaze in thine own heart,
The holy tree is growing there;
From joy the holy branches start,
And all the trembling flowers they bear.
The changing colours of its fruit
Have dowered the stars with merry light;
The surety of its hidden root
Has planted quiet in the night;
The shaking of its leafy head
Has given the waves their melody,
And made my lips and music wed,
Murmuring a wizard song for thee.
There the Loves a circle go,
The flaming circle of our days,
Gyring, spiring to and fro
In those great ignorant leafy ways;
Remembering all that shaken hair
And how the wingèd sandals dart,
Thine eyes grow full of tender care:
Beloved, gaze in thine own heart.
Gaze no more in the bitter glass
The demons, with their subtle guile,
Lift up before us when they pass,
Or only gaze a little while;
For there a fatal image grows
That the stormy night receives,
Roots half hidden under snows,
Broken boughs and blackened leaves.
For all things turn to barrenness
In the dim glass the demons hold,
The glass of outer weariness,
Made when God slept in times of old.
There, through the broken branches, go
The ravens of unresting thought;
Flying, crying, to and fro,
Cruel claw and hungry throat,
Or else they stand and sniff the wind,
And shake their ragged wings; alas!
Thy tender eyes grow all unkind:
Gaze no more in the bitter glass.
Apparently he wrote that for his love in a bid to keep her from worrying about aging, but I see it as a plaintive cry to all lost souls to not become hard and cynical and dark, but to always look into your own heart, and expand the joy there...
OP I know this seems like total rubbish from where you are now, but believe me I have been there, and the cure really is in your own mind.