1. Home i know where everything is.
So in a few other places i've been to before so i know where what things are, wjere walls and doors and rooms are etc.
2. I usually use one only when in a new place or need to specifically indicate I don't see stuff. Or of course when it's "dark enough" (which is personally a lousy indicator because I usually have to ask if it's dark). So i use a foldable one, which is in purse when not needed. Use it in the dominant hand, tap in front of you on the other side of which foot you're using, put your foot on the ground, tap on the other side, put the other foot forward. Depending on the type of cane and tip (long straight ones with metal tip would be the best for feedback), you can detect the type of ground, texture changes, crosswalks from the tactile squares/wheelchair ramps etc, and walls before you run to them. Another thing is you learn to use your ears a lot better when you have to.

One. I've lived in my house for several years so I know where everything is and I am pretty organized. I have an eidetic and photographic memory, so I can easily move around my own space remembering where things are and how rooms are oriented from before I lost my vision. Navigating around an urban area requires a lot of orientation and mobility training, at least for me as I have not been blind all my life. Still very much learning, but we learn cane skills, how to listen to parallel traffic in order to safely walk across streets, navigate obstacles, and problem-solving on the fly. When navigating to a new and unfamiliar place by myself, I have a set of Bluetooth headphones that I connect to my iPhone from which I use a GPS application like Google maps or blind square so I can hear which directions to go while walking around.

Two. I use a roller tip cane with a sweeping technique rather than tapping. Arm is down at my side, Cain is extended out in front of me, and as I move my left leg forward, I sweep the cane to the right to scan the ground ahead before I begin moving my right leg and planting my right foot. So on and so forth, sweeping the Cain back to the left as I move my right leg forward to plant my foot, then swinging back to the right as my left leg moves forward. The sweep arc is a little wider than my shoulders to make sure I account for the full width of my body when moving along, and it's a smooth and consistent sweep to make sure I get as much tactile information as possible.

If you are interested, I was in a recent specialist podcast that focused on my orientation and mobility teacher, going over how we learn too navigate and use our canes:
https://www.acast.com/thespecialist/11-canetrainer?autoplay?autoplay