My first day!!

I am learning English because I want to study abroad and make friends from other countries.

Maybe you were referring to other countries (países). Cities - ciudades

Country, City - Singular

Countries, Cities - Plural

We always capitalize the letter "i" and the first letter at the beginning of words like: (E)nglish, (A)merica, (S)panish, (M)exico

(I) am/(I)'m 

My first day!

I am learning English because I want to study abroad and  make friends from other cities.

my first day!!

i am learning english :) because I want to study abroad and make friends from another city  different countries.

I was not sure if you meant meet friends from your own country but different cities or if you meant meet friends from different counries.