South Shore Train

So I’ve never messed too much with transit and that sort of thing. This saturday I’m trying to depart from Southbends South Shore line as early as possible to get to Millenium station and then take a bus from there to McCormik Place Station. (This is for the C2 E2 convention woohoo) And then I need to be back in southbend by 5:30 ish.

I don’t know how early the south shore train departs from southbend. I don’t know what Millenium stations schedule is either. Is there anybody who can help with my transit dilemma!!!