Hopefully

Well, today is Sunday.In two days I'm going to do my Job's interview.I am not applying for manager,or any important post, but I really need this job.I also don't know if I am ready.I hope so.I've studied for several days, all the possible questions and my probable answers,but I know that I must to be ready to improvise and deal with all possible situations. [You can also say: I've studied all the possible questions and my answers to them for several days, but...]
I hope I dont get nervous or do make any mistakes.
I really expect hope [or I expect..] to speak clearly and in a planned way,passing giving a nice picture of my professional characteristics do to the interviewer.

Notes:

But should not go in the beginning of a sentence. Usually it will have a comma (,) in front of it.

Usually, really does not come before expect. Expect means that you believe something is going to happen. Such as I expect the results will be in tomorrow. This is the same as: I am almost sure the results will be in tomorrow.

Good luck on your job interview :)