Learning to play guitar takes a long time, especially if you don't have a plan.
There are so many things to do, so many songs you can play.
There are so many different skills to practice that may not even be appropriate for your skill level.
The best way to learn guitar is to start playing easy songs right away, then introduce other musical skills as your technique improves.
However, you must control the pace at which you are learning new things versus applying the skills you know and you must continue to rotate between topics to keep things fresh and new, and to improve in all aspects of guitar playing at about the same general speed in each area.
This is how you can avoid hitting a plateau and getting stuck in a rut.
You will always know what the next step is going to be!
Imagine if you did not have a GPS system for driving your car.
It would be impossible for you to get anywhere that you had not been to before, without consulting some type of map or even just asking for directions.
If you want to reach your destination in a reasonable amount of time, you're going to want a path to follow so you can be confident that you won't get lost along the way.