I can’t be sure it’s not a false memory, but I seem to remember sitting all buckled into one of those removable car seats on the floor of the hallway in our first house. The low perspective is very vivid and the place in the hallway is very specific (the threshold of the living room). That house would put me at under 4, but the angle etc would suggest I was much younger and in an infant car seat. I can never be sure if the level of detail supports it being a real memory or a false one. My first memory’s definitely in that house though. I remember in the heat of summer hanging out with my mom in the one room that had an air conditioning unit. But I was definitely ambulatory at that point.