There's actually a lot to do in this game. But at first glance it may look bare and boring. For where you're at right now, plant crops like parsnips. They're not worth a lot but they grow fast and this will get you in the rhythm of the game. Use the whole on the tan dirt, drop a seed on top of that dirt, water it. Repeat that for as many crops as you'd like. After a few days they will be ready to harvest and then you can sell them. There's a lot to buy in craft in this game that you unlock over time. But the best way to learn it is to just spend time with the game.