Hey TS, slowly, take your time. You will eventually get used to it.
You no need to really point at the direction of their face.
You can do discreetly, for the earlier part like now, learning.
Like pretend you are not shooting but the lens is facing their direction or so while you are standing/walking.
If not you can always point at the direction that you think they will fit into your frame, your veiwfinder, when they come into the frame you focus and ka ching!
There you go.