Learning

 In real life crafts to video games learning tends to be similar it seems. The fact of the matter being the whole idea of "taking it one step at a time" while with other game genres they're less of learning one thing at a time, for faster games the steps are much quicker, not that you're not taking it one step at a time.

When using Mercy's ultimate in Overwatch as an example that her learning curve to learn how to use her abilities are much more effective, however putting it all together to be efficient as possible is another thing however. The more efficient you need to be, the harder it is going to be for doing said activities.

The learning process seems to be one step at a time due to how our brains work while other people smarter than one another can learn past the one step at a time seemingly doing multiple steps at once, the rest of us less intelligent people are not going to be some god-like multi-tasker. That's not to say give up but to understand your limitations and try to work within your intelligence level.

I'm stronger in reading and understanding big words as an example where one step at a time won't apply to me but for others with less of a strong vocab that's not the case, for math I need to take one step at a time.

The simple rules for simple mechanics like reloading this isn't needed to be taken one step at a time but for other game genres you need to be thinking about how you react to things as a player, things that are frustrating to learn like fighting games, try to understand where players are having a tough time.