Unsure

So yesterday I was helping my mom in her classroom all day. Not long after school got out I got a phone call. It was the company I was going to interview with on Wednesday. They want me to come in on Monday and have an interview. They said that the class is still full, but sometimes someone won’t show up for the first day of training and I could take their place.
I still might not even have a job even after interviewing. I’m not sure how to feel about this. I don’t want to get my hopes up because I know that chances are, everyone will show up for the training class and I won’t get a job. But at the same time I want to think that I will get the job. But I don't want to be disappointed. *sigh*
Oh well, it should work out okay. Wish me luck!