discover planets. grindy resources, upgrade your gear and warframe. get a pet. go through tasks. the game is designed for the fact that you will go through the same thing over and over again.
zdanu4 and it is also designed for the fact that you will spend a lot of time on the wiki ... there are many incomprehensible moments in the game ... but the wiki is for those who are in a hurry ... and so they explain everything in the process of passing quests and etc.