Traveling Amtrak for the first time, major concerns?

I been on amtrak from missouri to illinois and vice versa show up half hour early so ur not rushing ur first time since there is no one there sunday and already have tickets in hand when train arrives just get on make sure to bring id now if tickets r paid for but u dont have tickets in hand u need to find the the amtrak machine that looks like atm and u need ur reservation number u need to swipe a debit/credit card doesn't matter what card as u won't b charged it should say print tickets or something like that and ask for reservation number punch in the number follow the on screen directions once ur tickets print wait for train one it arrives there is no seating order sit wherever unless u have first class there r racks on top of u to store luggage get settled in and when train starts to move conductor will check tickets abs thats it enjoy ride u can bring laptop or anything else to keep u entertained cuz there r electrical outlets to charge phones ect under the window and there is a food cart u can walk and sit down in as well as bath rooms but I advise bringing ur own non perishable food cuz it can b expensive