Welcome Bumukas.... :)
It sounds like you need some basic help understanding computers, but to answer you question about the forums, since you were able to type a message and post it in this thread, then you are properly registered and have access to over 40+ forums, except for 2 which are reserved for Contributing Members only.
How do I become a "Contributing Member"? (click here)
If you have specific questions about how to use the system, post a message in our Q&A - MILSURPS.COM Help Forum (click here) or the Q&A - VBBS Bulletin Board Software (click here)
I'm sure one of our board moderators, or even our general members, will help guide you through the process. If you found CGN easy to learn, than you should have no difficulty with this site at all.
Regards,
Badger