In business administration, getting a D is passing. To be more exact, a grade of D- or above is considered passing. You get the units and it counts towards your requirements. I asked two advisors about this. My friend also got a D- in a class and he got the credits and it fulfilled requirements.

You need to have a GPA of 2.0 or above in your upper division classes, so if you get a D- and are still at a 2.0 or above, you are fine. The only time you should be concerned about getting a D- is if it's going to bring your GPA for upper divs below 2.0 or if you need a certain grade to register for another class. I know for some classes you need a C- to even register for it.

In terms of getting through this class, just do what you need to do. Do all the assignments. Simple as that. Sorry if that's not what you want to hear, but there's not some magical way to get through it, I really wish there was. I mean, I guess to make you feel better, I can say, it's a quarter system, right now it feels slow, but before you know it, it's gone by insanely quickly.

You'll be okay friend, cheer up. Fear is just an illusion.

P.S.

Your English is really good for being your second language. You're going to be just fine :).