Who is OP? Are you referring to me? I learn better from seeing and doing, so yeah, kinda a visual learner (I'm a girl btw). I'll check out those videos. The reason I haven't been watching videos though is because since there's like a bunch of different bikes, I would look up what I need to know and all the videos would be for bikes that work differently than mine, and I couldn't find anything for the specific bike that I have.
Almost all bikes work exactly the same way. They may look different. Some will have more gears than yours and some will have fewer. Shifters might be trigger, twist, 'brifters', even electronic, but they also work the same way. So if you can understand the basic principles everything else is just a variation of it.