Hi nicksfan, welcome to the forums! You're doing just fine so far. I'd recommend just talking about what you're comfortable with in the beginning, and then as you feel more at ease, you can talk about more. I can assure you that you'll find people here that can relate to what you've gone thru. I was abused by my Grandfather from the age of 3 until I was almost 15. There are a lot of stories here, many have made me cry.
It is very normal to feel scared about posting, especially about abuse I think. So, take it nice and slow and post when you're ready. I promise you'll get lots of support, there are many warm and caring people here. I look forward to getting to know you!
I'm glad you found us!
Greg