Talk to the guide (starting npc) for tips on what to do next, you can also give him things you find and he'll tell you what you can craft with them. He's like the in game wiki and can be very helpful. Also spend lots of time just exploring, and don't be afrid to die.
When exploring make sure to collect any metals you see, and use them to building upgraded pickaxe and armor. Also build extra houses so you can have lots of npcs move in. I hope you have fun & definetly look things up online if you have questions :)
Lol this save also has a rectangle npc hotel. I typically build simple near spawn then build fun stuff around the map as I feel inspired / when I make pylons.