I'm not saying you should go to this particular conference, but I am saying: keep learning about writing. You can get this via writing conferences, but they don't need to be big national ones. Many local libraries or colleges have smaller conferences or programs. There are also tons of online resources, including videos, virtual conferences, online writing groups and the like. Of course, there are also lots of awesome books about writing. Figure out what you need to work on and find a book about that.
Reading carefully in your genre is also super helpful. What works? What doesn't? What can you steal, er, borrow, for your work?
No matter how long you've been writing, there's always more to learn...
Good luck learning!