So there is a box that when hovered over it displays all current status effects, I think by default it is on the top of the screen rather than the bottom. If you don't mouse over it, it will still show you the icons of the effects, just watch it cycle through all effects passively throughout any fight (Default 3: Hunger, Hydration, Sleep.) If you are worried about resources, there is an armor that adds a chance to gain 1 credit after any fight you win, and you can buy Food or Water from vending machines throughout the world. Also small tip: Scavenging building might drain your current hunger, hydration and sleep, but once you hit rock bottom you can keep delving without any new debuffs... Just be sure you have a great rout home, you're on borrowed time if you get in a fight.
Once you complete the Demo (No more area's to explore,) you will be given a unique currency that can either buy "Skill" Books or any missed boss scan data with. Hope this helps.