So I’m not going to be an asshole here like others, but here is a big tip. If you stand in front of the door, that’s fine! It just means that every stop, you gotta basically move to the very edge of the door, and put half your body in the train, and the other half out. Or step off completely. You give clear passage to others, keep your spot on the train, and won’t run into issues. Sometimes it’s completely unavoidable to stand in front of the door. That’s all.