Eres paciente pero divertido
"Eres" already implies the person it's talking to (you, in this case), if we wanted to make it formal, we would've used "Usted es" (You (formal) are)
Negatively: No, no hay ningun buzon en la plaza bolivar.
Positively: Si, si hay un buzon en la plaza bolivar.
Hope this helps!!! :)
I’m fluent, but if you are having a hard time with conjunctions you can get the app SpanishDict and it shows you all the different conjunction’s
la clase de tecnologia means the technology class. hope this helps