Very good, just a few minor details:

"Enterprise" in English, has a more restricted meaning -- you should say "company" or perhaps "business" in this context.

The infinitive consists of "to" plus the base form. Sometimes, you could use the preposition "for" followed by the gerund -- but you cannot mix and match in the same phrase. I believe you intended to use the infinitive here:

"a great tool to study and meet others english speakers" (Also, note that adjectives, including "other," do not have a plural forms. You're correct that the word "others" exists -- it is a noun.)

First time here!

Hi! I'm Sebastián (and I'm) from Chile. I want to learn English and I've been studying since last year, but this year I started to work at an enterprise (company) and I don't have much time to keep taking classes. I'm forgetting everything :(
So, I think this is a great tool for studying and meeting others English speakers/students or just people xd.
Please, if you want to practice with me, send me a message and help me. Also, you can correct this little text. Bye!

Welcome Sebastián, and good job! Remember to capitalize 'I' and the names of languages ('English'). 

First time here!

Hi! I'm Sebastián, from Chile. I want to learn English and i've been studying since last year - but - this year i started to work in an enterprise and i don't have much time to keep taking classes and i'm forgetting everything :(
So, i think this is a great tool for studying and meeting other English speakers/students or just people xd.
Please, if you want to practice with me, send me a message and help me. Also, you can correct this little text. Bye!