Hi everyone!

[No corrections are strictly necessary here. However the word "moreover" is a bit formal compared to the punctuation of your note, which is informal. If you wanted to write formally you would change some of the commas to full stops, so "I'm on italki to practice my English. I'm looking for someone to speak with." And: "I love art, in particular contemporary illustration, and animals. I'm definitely a cat-lady." If you want to write like a Brit, you should use "practise" for the verb and "practice" for the noun, but in American English your usage of "practice" is (I believe) correct.]

Hi everyone!

Take a look at the way I modified the punctuation, especially the use of comma and dot.

Hi, everyone!

Hi, everyone!
I'm Flaminia, I'm 26 and I live in Rome.
I'm on Italki to practice my English, I'm looking for someone to speak with.
I love art, in particularly contemporary illustration and animals. I'm definitely a cat person. lady.
Moreover, I love cooking. I attended a professional pastry course one year ago.
Please feel free to correct my English!

Thank you!

PS. Add me as a friend and I can teach you some Italian.

Brilliantly written, just a few minor errors. *The term cat lady has a bit of a negative connotation, usually refers to a lonely lady, nobody wants to be with. Hence, I have used 'cat person', which implies that the person is fond of cats. =)