Hi @Tamsin,
Welcome back to the forum. I know things may look very different compared to the last time you visited the forum, but I can assure it’s not as hard as it appears to navigate. I made some quick and easy tutorial videos shortly after we launched the new forum, you can find them here - How to use the forum - Tutorial videos!.
If hope you find this useful, however, feel free to @ me and I’l be happy to help. 
Best wishes,
Reah