In the beginning when you start playing Minecraft: you need a place to sleep, a crafting table, and you need a bed.
to make a crafting table you need some wood if you get wood make woodenplanks of it full the building place and now you can craft more.make a bed with three wool and wool three wooden planks to get wool you need too kill sheeps or shearing sheeps, you can not shear them so you have to murder them to get a bed, use your crafting table and fill the bottom row woodenplanks with the middle row with wool. When the night begins, go to your place to sleep ensures that no monsters com in.close the way to go in or out by making them your bed and use it. if you have time on that day more than chop wood make a pickaxe and some heel stone. if you wake up you need too destroy the bloks so you en get out. congratulations you've survived your first day.