Which is the right one: I have to prepare or I have to be prepared [closed]

Which is the right one and why:

Sample Context: I'm having the exam next week

I have to prepare Vs. I have to be prepared

Here, I'm expecting the meaning of these sentences, and in which situation they can be used [to prepare Vs. to be prepared when talking about the 1st person].

Given the sample context I would say: Before the exam you have to prepare for it. During the exam you have to be prepared in order to get a good score.

I have to prepare for the exam because in order to get a good score I have to be prepared.

So, "have to prepare" is an action that happens before the time you need to do a test or an exam. You have to prepare for the soccer game otherwise you aren't going to play well.

While "have to be prepared" is something that happens after some preparation in order to avoid problems in case something goes wrong. Example: you have to be prepared if you want to leave your parents house, because you'll need a way to pay for your rent.