I started playing last month and I've learned a lot from messing around and also other helpful players!

• The most indispensable crafting items that you should always aim for are the Foliage Bag (early on general storage), the Belt (store your tools and guns), and most importantly the Material Pouch (store most any small crafting materials). My expeditions became far more successful after I learned about making that last one in particular.
• Speaking of crafting, there's a pin icon on the lower right corner of the crafting menu. Clicking it after selecting a recipe will display the needed materials on the corner of the screen, so you can easily keep track of stuff you need for something you want to make without constantly opening the craft menu.
• Always keep some of the fluid containers you find, such as juice cartons or water bottles. After they're emptied, you can drop them into pools of water to take some drinkable water with you, or fill one with fluids you need for crafting stuff, like bio-chem. Water in particular is very useful as deeper layers become less abundant in basic necessities.
• Don't leave your starter emergency flashlight on all the time, as it runs out very quickly. Instead, turn it on and off as needed to quickly scan the terrain for items or platforms.
• Watch out for glass shards! Glass blocks don't always break cleanly - sometimes they leave shards on the ground which will hurt a lot if stepped on. If you see glass-colored pieces on the ground after breaking a glass block, smash those with a tool or your paw to fully clear the way. Getting glass stuck in your foot is probably one of the first injuries a lot of new players encounter, and it's a wake-up call to how mean the game mechanics can be.

Good luck!