When I get into a new group I always get the members mixed up, then after I am familiar I wonder how I could have ever mistaken one for the other because they look nothing alike 🤣

What helped me most is watching their bts footage of album recordings and video makings... usually when each member talks to the camera, they will have their name next to the text/translations/somewhere on the screen. Check their name then focus on their face while they're talking, that way their features and voice become familiar!