Learning

Hello, I've been learning English and I would like to be able to write and speak it fluenty and properly; I'd like to learn about grammar and how to write formal letters and different kinds of documents with English punctuation, etc., if any of you knows something about this, then I would appreciate your help, many thanks in advance, thanks.

Have a great day =D

es mejor decir "correctly" en lugar de "properly"

Excelente !

Learning

Hello, I've been learning English and would like to be able to write and speak it fluently and properly. 

I'd like to learn about grammar and how to write formal letters and different kind of documents with English punctuation, etc.

If any of you could help and teach me, I would appreciate it.

Thank you in advance.

Have a great day =D

Hello gris, I can help you with formal letters and documents in English as well as conversation practice. However, I'm not an English teacher. Let me know if you are interested.

Learning

Hello, I've been learning English and I would like to be able to write and speak it fluently and properly; I'd like to learn about grammar and how to write formal letters and different kinds of documents. with English punctuation, etc., Also, all the punctuation marks in the right place.  if any of you knows something about, I would appreciate Your help is most appreciated.  I thank you , [more formal] in advance. Thanks.

Have a great day =D

Your writing is good, except for some minor mistakes here and there.  You are the first person learning English who takes pride in using punctuation marks properly.  If you would like to have your essay corrected by me, just send me a link to it. :)

Learning

Hello, I've been learning English and would like to be able to write and speak it fluently. and properly; ( though not incorrect, "properly" is a bit redundant. If you speak fluently, then you are presumed to speak properly, though this is not always the case. Nonetheless, you make a good case for speaking "properly" further on in your essay.) I'd like to learn about grammar and the writing of formal letters and different kind of documents of various kinds. with English punctuation, etc.,  (again, "English punctuation" is redundant since you are presumed to be writing in English.) if any of you knows something about, I would appreciate (or welcome) your help from knowledgeable individuals. in advance, thanks  Thanks in advance.

Have a great day =D

Nicely done, gris! All very minor corrections.

You've had numerous corrections, but I think I have more to add.

Learning

Hello, I've been learning English and I would like to be able to write and speak it fluenty and properly ("properly" is fine, even though someone else suggested replacing it with "correctly"); I'd like to learn about grammar and how to write formal letters and different kinds of documents with English punctuation, etc.   (The period at the end of "etc." can also act as the end of the sentence.  What you wrote was a comma splice.  You put two independent sentences together with a comma between them instead of a period.)  If any of you knows something about it, I would appreciate your help.  Thanks in advance.

Have a great day =D