Im far from an expert on appeals.
But you need to read the reasons why the embassy refused the visa. There are quite few reasons why they may have refused the Visa applicaton, so of course how to approach an appeal would vary.
Also from what I hear appeals can be a long and lengthy affair. I have read of examples of it taking months. So it maybe worth considering a fresh application which might be faster, but of course that costs money. You would also need to provide information to counter the reasons why the visa was refused.
I hope you are successful and my advice for what it is worth is to think of all the options avaiable to you.
