Welcome to the new forum.
Can you let me know exactly what it is that you're struggling with on the forum? With regard to creating a new thread, all you new need to do is click on the 'New Topic' tab of the right hand side of the forum homepage.
Alternatively, you can post in any pre-existing threads by selecting 'Categories' on the forum home page.
Do let me know how you get on and I look forward to your response.