I think you got the point.
Finally, you'll need something to open the film with: I recommend a simple bottle opener. Buy one at your local convenience store for a buck or two, or repurpose a spare from your kitchen. I've been using the same cheap bottle opener since the 70s. I think I permanently borrowed it from my parents' kitchen. No need to buy a special film opener.
Practice, practice, practice: How to Load A Roll of Black-and-White Film
Before you develop your first roll of film, you need be able to to load the film onto a reel and place it in the tank. A straightforward sounding affair...until you learn that it must be done blind.
Lay out your tools in front of you: film cassette, can opener, film reel, tank and tank cover. Memorize their positions. Turn off the light (or zip the bag closed). You're ready.
At least, if you've practiced, in the light, you're ready. So, before you do it in the dark, follow the steps below in the light. Sacrifice a roll or two for this purpose.
Once you feel competent in daylight, close your eyes and try it again. You'll fumble. You'll fail. You'll fume. Keep trying. You'll get it, eventually.
Once you feel you can do it with your eyes closed, do it in the dark or in a changing bag, following these instructions. Again, be prepared for failure at first. That's part of the learning process.