When you take on a new move in Jiu Jitsu, you begin with basic directions to get some idea of the technique. A bit like someone giving you the bare minimum to get from point A to point B. Once you have the basic picture you are likely to ask for more information such as particular landmarks, the service station on the corner etc. Then it might be roundabouts, distinctive buildings, parks, etc. Now the trip from point A to point B is whole lot more than you thought it was.
In learning new Jiu Jitsu techniques, the journey begins with simple navigation with detail being added along the way. That's what makes it all that interesting. If you drive a particular route everyday, the more times you do it, the easier it becomes and you can rattle off a whole lot of details you've picked up along the way. Eventually, you go into auto-pilot mode, your subconscious mind takes over. That's what happens when you practice your movements over and over again.
If you like to ride a bike like I do, the fun part of it is how and where you ride it. To improve your riding skills you need plenty of hills, twists and turns; anybody can ride a bike on a flat and straight highway (how boring). So in Jiu Jitsu, some of the moves can get a little complicated, just like the twists and turns, but do them enough times, they become second nature. There is no such thing as a GPS in the martial arts, that's why we have Tour Guides (Instructors), hopefully, who can steer you in the right direction.
Enjoy the journey!