Introduction okay?

Hi, my name is Sven. I'm 36 years old. I'm from Germany and I living live near to Frankfurt Main. I'm here to improve my English skills and perhaps to learn other languages too.

I am guessing that Frankfurt Main is a proper title. If Main is a state name, it is ok. In the USA, we would usually just say the name of the city followed by the name of the country, unless we were talking to a person in the USA and then we would use the state name instead.

Introduction okay?

Hi, my name is Sven. I'm 36 years old. I'm from Germany and I living live near to Frankfurt Main. I'm here to improve my English skills and perhaps to learn other languages too.  ("too" is correct, but "as well" is more common and sounds better in this type of sentence:  ... and perhaps to learn other languages as well.")

I live near New York.  She lives near Boston.  My uncle lives near Paris.  Etc.  You don't need to say "near to" in this type of construction.

I live = Ich lebe.  I living = Ich lebenden. 

Introduction okay?

Hi, my name is Sven. I'm 36 years old. I'm from Germany and I living live near to Frankfurt Main. I'm here to improve my English skills , especially my speaking skills, and perhaps to learn other languages too  as well.

The official name for Frankfurt is Frankfurt am Main(Frankfurt on the Main river), right? No one needs the official title; Frankfurt is referred to as Frankfurt alone by the rest of the world.
Note the use of commas as parentheses(brackets).

Being precise and compendious goes a long way towards achieving fluency. :)
Good luck!