My first text.

Hello friends,  “My” isn’t necessary because it’s implied/assumed just by saying “friends”

I'll try to write a little here, but my English is terrible. 

My name is Sergio Etzel and I live in Brazil. This year (2018) I want to learn English and meet new people to practice with.

I hope you can help me and that I can help you learn Portuguese.

Instead of saying “hugs!,” you could say “thanks!” or “later!” or “peace!” Saying hugs or kisses to end a conversation or message isn’t normal in English. 

My first text.

Hello my friends,

I'll will try to write a little here, but my English is terrible, ok? # Abbreviations not for writing, but for speaking.

My name is Sergio Etzel and I live in Brazil. This year, 2018, I want to learn English and meet new people to practice the language.

I hope you can help me and I can help you learn Português Portuguese.

Hugs!

# Excellent first text, Mr Etzel.