Welcome to Lemmy! After you login, you can change between different view modes (subscribed, local, and all), change some of the filters, and select to create a new post. When making a new post, you will have to select a community to post it in (e.g. “nostupidquestions”) and give it a title, and optionally a description, image, or link. Pretty neat!

If you want to experiment with different user interfaces, you can try Summit, Jerboa, or Thunder (on Android) or mLem (on iOS)!