Find someone, whose writing you can appreciate and contact them directly! If they are someone, who is found in a Google search, participates in places like Hubpages , on forums and have either a blog ,website or both, are recognized by other skilled writers and can be approached, try contacting them for help!
Most good writers will be willing to help those who are serious about Improving their written and oral skills. Use your discretion when approaching them, approach writers who they correspond with, read their comments, their blogs and learn as much as you can before making your first contact.
Be respectful and courtesy when they do reply and you're on your way! Good Luck and Best Wishes with your search!
Regards Mike! (Aka Professor M!) ;D