I just started playing Terraria. I've consumed no Terraria content other than some obvious spoilers that practically everyone knows like the special sword (and powerscaling the Terrarian)

I have no idea what I'm doing. I read what the Guide was saying and built a house with two doors and gathered stars, 5 of them and then zombies and those eye demons swarmed me and killed the guide and me so I quite because I kept dying and did not know what to do

What do I do?

And BIG THANKS TO U/Only-fix5572 FOR GIFTING ME TERRARIA