I started the process of moving toward not looking about 5 years in. I started with familiar exercises found in the Daily Challenges. It was darn near organic. I found I could not make the sound I wanted while looking at the fretboard. Bout 5 years later I rarely look. Please do not use this as a comparison for when you will plan on being free of having to look. The variables such as: how often, how long, how directed, how focused, how young, how old, how much musical inclination (none for me, I was last when musical talent was getting passed out, but I was first in line for determination) how fast can ego be dropped, and no doubt many more make it impossible to gauge or plan. You may get there faster, you may never get there, let it float around in academic thoughts. It will come the greater you find need for it through direct experience. (not specifically worried you will be delayed by comparisons but it cost me time and increased frustration until I stopped, I write to remind myself and to introduce the idea to those who have found success in other areas with this practice not to apply it in learning guitar).