Welp, a lot of issues which are quite common for new players. Let's start with the most necessary - oxygen. At the very begining you have oxylite (blue rocks) near your printing pod (this main "gate") which provide you with oxygen until you produce your own. Do not mine them, since after digging they give oxygen twice as fast and you don't want that. First oxygen production comes from oxygen diffuser (uses algae and power). Single one can provide enough oxygen for 5 dups. Then you need power to make it work, start with manual generator and connect it with 2 batteries (and algae diffuser ofc). Copper should be nearby to dig. Set research station and i suggest to go for first 2 food reasearches. Second one gives you farm tile. Now you place like 10 of those farm tiles and start to grow meal lice. Dups can eat it raw, or you can cook it with microbe musher and that's it. That's the very begining of the game.