As a complete newcomer to Terraria, and to video-gaming in general, I give you some of my initial observations both playing the game and perusing the forums:
Playing the game
Watch out for the green blobs! I think they call it slime but they move like blobs. Unassuming on the outside but harmful to the touch...
I downloaded both the app and the PC version of Terraria to try both. I find the app much easier to maneuver with the touch screen options. The PC uses keyboard keys to perform functions which is a little difficult to get used.
I selected this game for two reasons: 1) because it's 2D (going back to my roots!) and 2) it's a sandboxing game where one can just go and explore. Right now exploring is all I do. I'm not really sure how I can progress so I'm relying on any type of insights or instruction I can glean from the forums.
Wow, this is quite the place! I can't believe how many members there are for this game. My first thought is - how old are these forum members? The game appears to be something more designed for kids, similar to Minecraft.
The forums are structured like a traditional message board but within the space are a number of social groups, each with their own rules, moderators, and resources.