Spanish for here is aquí.Here is a key for you.
You are talking about a building. How would you say:
1 translation: It is here.
The thing is, there are two words for being in Spanish. One is for permanent being and we have learnt it already. If you use this word, you mean things that are more or less constant, such as your name, your profession, the place of a building or the number of stars in the visible universe.
There is another kind of being in Spanish. It’s temporal being. It’s like being at a place or being in a good mood, etc.
The temporal Spanish for you are is estás.
How would you ask:
2 translation: Are you here?
You have already learnt that to say the he form you simply have to take that last s off. Say temporarily:
3 translation: Pablo is here.
The temporal form for I am is estoy.
It should be something like esto and actually if you look for example in Portuguese which is very close to Spanish, it’s estou. It’s still an exception and in Spanish it’s an even bigger exception because it’s estoy.
If you are interested in why it's not esto or something similar but estoy, the answer is this: the y comes from the merging of estó and y which in medieval spanish meant there (ahí in Modern Spanish). So estoy actually meant I am there and now it's the temporal I am.
Spanish for busy is ocupado.
It actually means occupied as you can see if you have an IQ above 80 although IQ is unrelated to you being able to figure it out oh and I am just kiddin’... nevermind.
How would you say:
4 translation: I am busy.
And ask one more time:
5 translation: Why are you busy?
Of course, ocupado is also just a form for men and you say ocupada if you are a woman.
Spanish for how is cómo.
If you want to ask somebody "how are you doing" you ask literally "how are you" by using a form of estar. How would you ask:
6 translation: How are you?
Spanish for well is bien.
You could answer:
7 translation: I am well.
There is another combination that’s used a lot. How would you say using the temporal is:
8 translation: It is good.
If you say it fast, it means it’s good and it’s used to mean okay. So, how would you say:
9 translation: Okay.
This is how some of this stuff works.