My daughter and I would like an affordable low budget but safe trip to Chicago. We will take AMTRAK to union station. I understand we can use public transportation from there to get to a hotel or air bnb. I need suggestions on where to stay, affordable fun shopping, and what sites to be sure to see. I want to stay somewhere safe and affordable but where we can use public transportation to get to everything. We have never been here and would like to hit the highlights!