Hey Aprilmathis,
On PC, as soon as you go to Bluelight.org, you are welcomed with the home page. The very first "box of information", in the top right corner, has a list of all the forums.
Are you on mobile?
Do you need help with posting also?
If you have any more questions, feel free to post here or PM me (link in my signature).
Best,
madness00