Welcome to italki!
Well, you've found the Answers section already... if you want correction for your writing, you can use the Notebook section (www.italki.com/notebook), or you could even join a discussion at www.italki.com/discussions
You can also find language partners and email them directly. No chat function here, I'm afraid.
If you want proper lessons, you can find teachers and tutors here: www.italki.com/teachers/tutoring
Good luck, and enjoy your time here!