appleshampoo, as someone who has Neptune conjunct MC natally, I can commiserate with you in your current situation. Also, you have a number of squares to your MC, and that doesn't help you to `see' a clear direction in your life. The fact may be that there is no clear direction to be had for you.
Firstly, it appears you were born quite a way north of the equator, and so Equal house system may provide a more accurate chart for you. Having said that, I'll read the chart as it is, and see where it leads.
Having Jupiter in the 10th house usually describes someone for whom doors open career-wise, so that when one door closes, another one miraculously opens, but it might not be quite that cut & dried for you. I have 2 nephews with Jupiter in the 10th, and they have both experienced the door-opening syndrome in their careers, but both of them knew what they wanted to do from an early age.
With a Pisces MC, your career is unlikely to form a straight line. You will be led by your instincts and even your emotions where career is concerned, and I suspect that your `career' will be varied and changeable. With Neptune currently transiting your Pisces MC, clarity will not be forthcoming. Given Neptune is your MC ruler, and Neptune, along with a bunch of other planets, is in your 6th house, you will be led/drawn/shown a direction which is service-based. I can't imagine that a corporate environment would suit you at all, although I can understand how it is you have found yourself working in a boarding school.
What I have said above is very generalised. A career in some kind of `service' sounds a bit dull to most, but there are a huge number of areas within this umbrella. Given you have your Aquarius Sun and Mercury in the 8th, some kind of investigative work, or even something with a psychology basis might appeal to you. Something technological may also appeal, as would science ... or some medical/health area. The other thing is that with Uranus in the 6th house, also conjunct your Moon, boredom is something which may often plague you. You need your work to excite you, to be challenging, and preferably not to be performed within the same 4 walls, day after day. Boredom could destroy your zest for life, so always pay attention when it emerges. (Your chart is quite suited to something like working in Accident & Emergency, or in an ambulance service ... plenty of variety in both those areas.
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With Mars in Aries in the 10th conjunct your North Node in Aries, you can be quite ambitious (which is a little at odds with that natal Neptune, which squares your Mars) and you can be a risk-taker. Perhaps working outdoors might suit ... or not!
Your chart ruler is your Moon in Sag in the 6th house - conjunct Uranus, Venus, and Saturn. That tells me that any service work you do - paid or unpaid - will be changeable, and that you
could work/serve in some kind of outdoors endeavour, such as holiday camps ... I'm not up with that sort of thing, so my ability to suggest something within that framework is rather limited. You need to be able to move around, to move your body, and even put your body under stress. You need to face challenges - physical mainly, but any challenge will do.
Lastly, with Chiron in 12th house, you are sensitive to the emotions - and perhaps even the thoughts - of other people, so you need to take that into account also. You
could counsel others, but you might require a bit more life experience before you are able to do that effectively.
I'm sorry I can't be more specific than that, but I have just read the indicators I see on your chart. The squares from your 6th house planets to your MC - and to Jupiter - add to the difficulties you are having in determining a pathway. Perhaps it will be the journey which ends up being significant for you, rather than your ultimate destination.
EDIT: Your chart kinda screams nursing, and this is a career which can be carried out in a hospital, or a clinic, and you can take those skills to other countries, I believe. (I have written this sentence about nursing a few hours after posting, and although it jumped out at me while I was writing this post, I was afraid that nursing sounded too cliched! However, there are many ways and places in which one can work as a nurse. And male nurses - you are male, are you not??? - tend to be in demand, I believe.)