My first post

Here I am. I am trying to improve my English and maybe the italki community can help me to do it.
A friend of mine recently talked to me (ok, but "told me about this web page" sounds better) about this web page so I have decided to try it. I am awear aware my english needs improvements and I am determinated to get it do it.
I really would like to enhance my writing writing. First of all because I am going to use english to prepare public examinations in my country, and secondly , (no comma here) 'cause ('cause is short for because) I just want to feel more confident when I am writing. Please don´t hesitate to correct me as much as you want. I Know know I can be a mess, so any correction will be wellcome welcome.

thanks :)

My first post

Here I am. I am trying to improve my English and maybe the (you haven't mentioned "Italki community before, so there's no need for "the" here) italki comunity (community - just a spelling mistake) can help me to do it.
A friend of mine recently talked to me about this web page so I have decided to try it. I am awear (aware)  my english (English - the name should be written in capitals) needs improvements and I am determinated (determined)  to get it.
I really would like to enhance (I think "improve" is better)  my writting (writing). First of all,  because I am going to use english to prepare for public examinations in my country and secondly, 'cause I just want to feel more confident when I am writting (I think it should be "write"). Please don´t hesitate to correct me as much as you want. I Know I can be a mess so any corrections will be wellcome (welcome).

thanks :)

Nice work, Mario! Talking the first step can be the hardest, so congratulations! Here are my corrections for you:

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My first post

Here I am. I'm trying to improve my English and maybe the italki comunity can help me to do it.
A friend of mine recently talked told to me about this web page website so I have decided to try it. I am awear aware my English needs improvements improvement and I am determinated to get do it.
I really would like to enhance my writting improve my writing.First of all because I am going to use English to prepare for public examinations in my country and secondly, 'cause* I just want to feel more confident when I am writting  writing. Please don´t hesitate correct me as much as you want. I Know know I can be a mess so any corrections will be wellcome. welcome.

thanks* :)

*I put a star by " 'cause "  and " thanks "  because these are fine in very informal writing. But you might want to use "because" and capitalize "Thanks" if you are sending a work email. 

By the way, your grammar is great, and you express yourself really well! I just found some little spelling mistakes. If you try writing in Word or Google Docs (turn the language to English) you will see where the spell checker function will tell you when a word is misspelled. That might help you with your writing. Keep it up!