This is actually how knowledge was transmitted traditionally. As an apprentice/student you just copied the master who would steer/nudge you in the right direction occasionally. Otherwise you just did the activities blindly until slowly you self-regulated and moved onto deliberate practice stage. This can be most clearly seen in the study of martial arts. Musashi called it Heiho/Hyoho in his A book of five rings.

I believe the key here is to focus learning on the overall activity (i.e. systems view) rather than the constituent individual pieces. Focusing on the latter just overwhelms you with too much detail leading to doubt and confusion. For example, in Software Development, if you try to focus on every single aspect like Correctness, Error handling, Generalization, Optimization etc. in the beginning you simply will never get anything done. Instead focus on just getting "a program" done using whatever knowledge you have. Once that is ready, then modify it deliberately for meeting all your other criteria.