Welcome to the forums.
Well, one way is to start on the main page. Pick a main topic forum (like Christian Music Forum), click it and that will take you to a page full of sub forums to browse through.
Also, on the computer (sorry, I don't know the page lay out for other devices/phones) but on a computer in the upper right hand corner is a magnifying glass. That gives a searching option you can always try playing around with.
Of course you are always welcome to start a thread yourself.
You have already started 2 of your own threads (way to go!). Here and your 'I'm a singer/song writer ' thread. So you're likely already aware that new threads take time to show up publicly. The moderators have to approve them before posting them; typically (at least my experience has been) it happens within a day.
There is a User2User tech support forum (bottom of the main list on the main page). And that is a great place to post if you have specific questions, or just continue to post questions here too.
Enjoy!