when we use Quanti and when we use Quanto? I got confused.Does the nouns in Italian have countable and uncountable like English?

how to say "someself(ves) in Italian? just like"i can do it myself","she will do that by herself“

Does someone knows the university of Venice? if i learn German there,i will stay in Venice or other cities?Venice is very beautiful and I want to study there.please tell me something about it,thank you.

what is the difference between"lavare"and"lavarsi"?

if i want to say:my washing machine is out of order,is "la mia lavatrice è guasta",right? or some other expressions??

First notebook entry: Introducing myself Io vengo dalla Cina.Ho diciotto anni.studio italiano adesso.