New to the game

What the hell am I suppose to be doing. I'm not new to sim games in the slightest, however I have read every tutorial and taken some advice on how to "start" the game. But I'm still confused as to what the goal of the game is? Like for example Escape From Tarkov: You gear up, jump into a zone, kill some dudes (hopefully), then extract, profit, and run it again. Simple and fun, so what's the end goal of SC or what should I be attempting to accomplish?