That little banner that shows for a few seconds at the bottom of your page(If not there the little button in the bottom right corner that says "show
ribbon" will open it. On this ribbon you can go directly to your threads, posts or your whole profile as well as messages etc.
Question already answered, but it's okay to click on things to experiment. Click away on things, visit other people's profiles. You won't hurt
anything.
You can also click on your own member name above your avatar and it will open your profile, from which you can also choose to look at threads and
posts.