I encourage you to just write something, when I first started writing fan fic I hadn't written any fiction since I left school. I don't hold my own skill in much stead, but I do know that I have improved immensely.

I only read R/T and even in that relatively small portion of fandom there is a lot of bad fic. But, I think that the reason for that is largely that as the fandom has grown we are seeing a lot of the younger members post fic. And while I respect their writing talents, they don't have the eye or the experience to portray an accurate adult relationship and so fail on the realism points.

I would like you to try, I will help you where I can, if you want it.