If you click the Search Box at top right you can put in a members name, eg yourself, and it will bring up a list of all their posts. Might find where your others have gone if you've "lost" them? But, looking at your post count you've only done 3 (as above).
Hello welcome, as others have said find which section you want to post in by clicking on forums at top of page, when you choose which category you want to post in select at the top "start new thread" as you did to start this thread then ask your question. You can click on the option (watch thread) then you will get Alerts when any one reply's.
Good luck I'm sure you will soon get the hang of it.