What to do about this manager/job?

Hi I went in for an interview at Earls (restaurant) on thursday. It went very well and he told me he was going to put me on the schedule for next week (this week now) and I'd most likely have an orientation on wednesday. He wanted me to email him on the weekend about availability and he would respond with my schedule. I did so on saturday, and there was no response and I sent another this morning and the same thing. I called in this afternoon and he told me it was busy today but don't worry it's on his to-do list for today. I can't help but be a little anxious when I was told I was going in tomorrow yet I've been left in the dark and now it's 10:30 PM the night before??