Welcome to CC! (waves friendly greeting with mortal hands to everlastingarms)
I suggest you read the "Sticky" posts at the top of each forum. They provide a lot of basic information. The "REPLY" button is your friend; when you reply to someone's post (even your own, to add more), everyone else will know who you are addressing.
After you click "Post reply", you have five minutes to make edits before the post is permanent. I suggest proofreading your post
before clicking it.
For most other things, you'll learn as you go. By the way, make sure you read the Site Rules.