Hi ! I’ve visited Chicago many times with my husband (he drives) but soon a friend and I plan on going. Neither if us want to drive downtown and would like to park outside of the city and take the train in (just going for the day to do some shopping) I’ve never taken the train and have NO IDEA where to even begin! The maps look so confusing! Is there a certain station that’s better than others to start from? Does the train run all night? Any tips are appreciated!! TIA!