@GoodKingElliot I'm going to follow this because I keep getting routed to microblogging instead of actual posting.
That said, if you want to find different forums, click "Magazine" at the top toolbar, and it will route you to different forums. You can then "Subscribe" and/or "Search" like you would for Subreddits. If you click on the dropdown menu next to your username, it will give a few different "view" options. click "Subscribed" to select a feed of your subscriptions. It is not default, and if you want to view subscription feed right now you have to choose it every time. If you click on the kbin icon at the left it will give you the equivalent of "r/all."