I havnever wen't madeto any English classes in my childhood, instead I learned a little bit of English just playing games.

It's good to use a contrasting word when making contrasting points.

In adult life I saw that the English language could open a lot of possibilities in my life, for example, a better job, self confidence when traveling to a country whichere English is the main language, working remotely world wide, and etc.

This is my main motivation to stillcontinue learning English.

I haven't madetook any English classes during my childhood, I learned a little bit of English just playing games.

IAs an adult life, I sawee that the English language could open a lot of possibilities in my life, for example, a better job, self confidence when traveling to a country whichere English is the main language, working remotely world wide, and etc.

"As an adult" to sound more natural.

"See" in present tense because it is something that you still see until now. If you want to use past tense, you could say "I learnt that" or "I discovered that".

We don't need to write "and" before "etc.". In fact, "etc." comes from Latin and means "et cetera", and the "et" already means "and". So you would be saying "and et" or "and and".

This is my main motivation to still continue learning English.