Hi there! Welcome back 
tips for getting back into writing:
reread something you wrote from chapter 1
talk about the stories you were/are working on
visit me at this thread
So I can ask you about your story and we can ask each other and hopefully inspire each other 
I can ask you all kinds of questions that can get you back into your story 
Getting back into the Wattpad community, you could start out by posting in your announcements, visiting Wattfriends profiles and messaging them, joining book clubs.