Yony, is your objective to make up astrology as you go along, or are you interested in learning what has been written about it by practicing astrologers with far more experience than you have? (Like for the last 2000 years, or at least, for the past 60.) Your own lens and life experience have merit, but you cannot substitute them for the established body of knowledge out there.
You cannot just make up the meaning of the elements as you go along, unless you plan to practice some kind of astrology that is so idiosyncratic that you have a "school" of one.
You might read Stephen Arroyo's book on the 4 elements. I think it's still in print. Basically he talks about what seems very real to people with an emphasis on each of the elements.
Air: ideas are very real
Water: feelings are very real
Fire: Action, enthusiasm
Earth: material things
Traditional astrology identified 4 personality types: sanguine (air,) choleric (fire,) melancholic (earth,) and phlegmatic (water.)
When you combine the elements in this way with the signs' modalities (cardinal, fixed, mutable) then the signs begin to make a lot more sense. For example, Pisces is the mutable water sign, meaning that it operates primarily through feelings and is very adaptable or flexible. Taurus is the fixed earth sign, hence its reputation for being stubborn (fixed) and oriented towards material things.
You wrote:
I have a pisces moon, and the neptunian energy of it has always made me so incredibly sensitive to the point where it's not even funny, I have always struggled in conversations and almost my entire life haven't had the ability to control my emotions well enough to hold a decent conversation with anyone other than my closest acquaintances. Only after years of having it am I now able to control it well enough to talk to strangers.
....
To make matters worse, I'm a BOY, AND I am and always have been straight, so being so naturally emotionally weak growing up was, as you can imagine, hell.
If your early life experience consisted of being so sensitive that you feared meeting strangers, and got viciously taunted for being a "crybaby," you have my sympathy. At the same time, these are not typical experiences of watery moons, so you cannot generalize from your personal experience to roughly 1/4 of the world's population with water moon signs.
Do you want to post your chart?
What astrology books or sites are you reading?
I do use asteroids-- judiciously. There are thousands of them out there, and by the time you're using them with minor aspects they tend to turn into so much space junk. Normally I stick with the conjunction to an actual planet. (There are some exceptions like namesake asteroids in synastry.)
What do you mean by "mental disease"? You seem to have some archaic ideas about mental health.
My daughter's Pisces moon opposes her Virgo sun and Mercury. So technically it's afflicted. She's 34. I think it's fair to call her sensitive, but she doesn't have a "mental disease."