Hi Ezquiel,
I have really bad skin too, so I empathize.
Looking at your chart, I think it's wise to make a connection to Capricorn ASC, which is the filter/blueprint for which everything else in your chart is laid-out. The ASC also reflects one's physical qualities, and being in a later degree of Capricorn, it's also in the Virgo Decan, meaning you need to strive for balance between pursuit of Pleasure (Taurus) with the negative influence of this being pursuing to excess, and pursuit of Complete Control of One's Desires (Capricorn) with the negative influence of this being stridency and and overbearing sense of discipline leading to dullness and miserly qualities (sort of like the dryness of Capricorn personified). Virgo encourages a natural balance between these two, so perhaps you could operate from this place in your ASC? Maybe consider seeing what you're doing as a balancing act rather than strictly an act of limitations so as to bring about health. Because Virgo is naturally predisposed to be concerned with health, and Capricorn is naturally given to creating structures boundaries and limits, its seems like you are naturally given to being able to physically balance yourself and you should see what your doing as being in harmony with how you are.
I know that seems difficult because sugar and the other products you mentioned are so enjoyable but it might also be that with your Moon in the 6th house, you might feel a wax and wane in your values regarding what you should do to be nurturing to yourself, sometimes feeling the overwhelming desire to be fully immersed in this act, but then also feeling like this act completely removes you from feeling connected with others. Because food has a connection to our emotions, and our relationship to our Mother, or our primary care-giver, when someone like you has the Moon in the 6th house this relationship becomes very prominent and very important. When you were an infant, you were blessed with the capacity to only eat when you were hungry, and never at any other point. The other thing was that you only ingested one kind of substance, ideally this being breast-milk or some strongly-fortified baby formula. What this represents is a kind of purity or simplicity, which can be associated with Virgo or the 6th house. It might help you to see that pairing down your food choices to just the basics, even getting a bit constructive with it, which would be helpful considering them placement of your ASC, and something which would come naturally to you.
I see other people suggested many things to you, but looking just at your chart I might say that getting down to the basics is the most important, and "everything in moderation," being the attitude that you want adopt. Then I suggest personalizing it. You have an abundance of fire so I might reach for more cooling foods. Cucumbers, salads (with light amounts of additions, focusing mostly on the vegetables and using oil, vinegar, lemon and few cleansing herbs and spices, such as cayenne, garlic, clove, and coriander, very simple easy to purchase and find choices, and it doesn't require a huge change in your daily routine and it's not very expensive.)
That doesn't mean that you can't reach for other foods. You can eat "warming foods" such as carbohydrates, but I would stick to whole grains. If you decide to indulge in carbohydrates, drink a glass of lemon water plus cayenne pepper to immediately aid the body in flushing this rush to your system and insulin spike. Now, I'm not saying you can therefore indulge all you want and then just drink this stuff afterwards, but let's say you went to a friend's house and they had a fruit tart, and you had a piece. Just go home and be sure to cleanse your body. It's kind of like ok, here is the treat for my tastebuds and now here is the treatment for indulging.
That way you're not only promoting a healthy body system, but also a healthy mental attitude towards yourself and how you treat your body, with the potential for this to ultimately alter your chemical state. When that happens you may actually be able to indulge a little bit more.
Here is a book I found that really helped me with my skin for awhile, because it also focuses on rebalancing your hormones, which is also a concern with the Moon in the 6th house. With so many oppositions to your Moon it might good to refocus a lot of your attention on balancing your hormones, which comes into focus partially through the dietary changes suggested but also be recapturing the essence of what I spoke about above with the body's natural rhythm and approach to nutrition and nurturing.
Here is the book:
http://www.everydiet.org/diet/fat-flush-diet
It's primarily focused on encouraging weight loss, but you can also use the dietary plan and small supplemental additions, to rebalance your hormones.
Hope this helps some!
Mod.