Starters usually pitch every 5th game. Closers can pitch consecutive nights, but they usually only go into the game in a save situation. Look up save situation. Sometimes closers are put into the game in a non-save situation and that's when they get rocked lol.
I looked at your roster. You don't have any bench pitchers, so you don't need to be concerned about rotating starters.
Yeah it'll have a blue PP by the pitcher when he's gonna pitch. You can also click on their names and see when they'll pitch next. Look for NEXT SCHEDULED START on the right side of the window that opens when you click their name.