One more view, based on 40+ years experience. Once in the dark, after the tank is open, and the reel it out and oriented in the proper direction, turn the light out. Break the seal on the roll, and begin to unwind it. When you come to the film, separate them letting the film roll into its own roll [handle it only by the edges]. When you get to the end of the film, gently [holding the film] peel it away from the paper, LEAVING the tape on the film. Drop the paper on the floor to be disposed of later.(posted 8219 days ago)Holding the roll of film by the edges, fold the tape across the end of the film. Yes, leave it on the film. Then use THAT end to insert into the center of the reel under the catch [assuming use of SS reels here]. The tape only takes a little bit of film and won't intrude into your first image if you loaded the film right into the camera in the first place. 120 film IS thinner than 35mm film and therefore is more subject to easy kinking, which leaves little "half moon" spots on your developed film, so try to feed the film straight as possible into the reel, holding the reel with one hand and the film by the edges with the other.
The most important part of the reel loading process is the "first turn", that is the beginning of the winding process once the film has been attached to the catch inside the center of the reel. Make that first turn firmly, checking to see that the film is indeed centered on the reel. Once that is done, you can easily wind the film until the reel is full. By getting that winding process started correctly, you won't get those spots where the film in one winding gets out and touches the film in another winding, thereby ruining any exposure where the film touches and prevents processing.
Do buy a cheap roll and practice all this in the light first. Good luck.