My Moon is in the 11th rashi, Kumbh (Aquarius). Is my element air?
Yes. Your rashi is Kumbh and your element is air.
Related questions
My birth rashi is Mithun (air) and my name is from Simha (fire). Is that a problem?
No problem. When a name cannot be taken from the birth rashi, it can be taken from a friend rashi or friend element; air makes fire blaze, so they are friends.
Besides exaltation, debilitation and degree, how do we judge whether a planet is good or bad, for example in the 6th or 8th house?
The 6th and 8th house rule has not been given yet. The full rules will be taught later using example kundalis of five students. For now judge by exaltation and debilitation; not every 8th-house placement is bad.
Can a person whose Sun is debilitated (neech) have the drawing room in the East?
Yes, with remedies; he will not leave the East unused or build a toilet there. A drawing room is not a permanent seat. Only permanent seating, such as an 8-hour business seat, should not be chosen in the zone of a debilitated planet.
Do the directions of the kundli houses shift when the rashis or planets in them change?
No. The 4th house is always North, the 1st East, the 10th South and the 7th West, with the sub-directions between them. Like water flowing in a river, planets and rashis keep moving, but the direction a house represents stays fixed whichever planet or rashi comes into it.
Does a conjunction (yuti) work only when planets sit together, or also through aspect?
It also works through aspect. Sitting together and an aspect relationship both give the result, so Jupiter aspecting with its 5th, 7th or 9th aspect, or Saturn and Mars with their aspects, also forms the relationship.
Each house of the kundli has a rashi in it. Does the rashi decide the direction?
No, the rashi plays no role here. The 4th house is North, the 1st house East, the 10th house South and the 7th house West, with the sub-directions in between. Real charts are then analysed, five a day from the student group, to decide each person's interior; the key is knowing what to do for exalted planets and what for debilitated ones.