One thing that I always struggle with w/ self paced guitar stuff is that I never know if I'm ready to move to the next step, or if I'm belaboring a step too long. Coincidentally, I started taking a martial arts class, and there are a lot of interesting parallels esp around repetition to gain muscle memory. The approach in those classes is a lot of different small things to learn/memorize/commit to memory over a longer period of time, rather than complete step 1 with intense thoroughness, move to step 2... etc.
I think lessons would be helpful because you have someone there that's taught dozens of people before and can probably accurately evaluate where you are and when to learn new stuff and how to get over your specific roadblocks.