Your first day

Surviving your first day in Magica Prime is very similar to surviving your first day in vanilla minecraft. Get wood, build tools, make a shelter. Your easiest shelter to build starting off is a hole in the ground. Don't go above ground at night until you're well equiped. The things that spawn at night will kill you, no amount of skill will save you from many of them.

You only have 6 hearts to start off. The easiest way to get some more is to eat a variety of foods. Spice of Life will track the most recently consumed 14 things and give you benefits based on how much of a variety there is and how complex the stuff you're eating is. Make the spice of life lunch bag/lunch boxes to ensure you're rotating through available foods and you can easily get more then 10 hearts, along with other benefits such as a continuous strength buff.