Hi, the door opened inwards and forwards, against the inside of the fuselage. There was a step over the ammunition tracks, inside the doorway. If you have a look in the Group Build section, in the 'Heavy Hitters' threads, you'll see my Lancaster build, showing the door and the step, and the other details around this area. There's also a diorama base which might give you some ideas. It looks like this, in the attached pic.
Welcome to the forum, and don't worry about your English, it's good enough, and way better than my Flemish or Walloon !!
Hope this helps.