the technique will get easier, especially if you can manage to get out of the "proper exposure" trap. Technique will become more intuitive.
Turning off auto everything is a good start. Not so much because AE doesn't work, but it may not work quite the way you think it does. The "exposure meter" is one of the most misleading and least understood tools we have available, this especially true of reflective meters: the kind found in cameras. Learning manual exposure should be, imo, something beginners are encouraged to do - rather than something lefter for more intermediate studies.
If you are feeling underwhelmed, then there is something you aren't understanding. You're likely looking at camera control from a perspective of "how do I get this to look like how it is", and not "how do I get this to how it should be" - what aspect of the subject are you most interested in, and how does that affect the technical end of things?
I think there is only a single difference between a photograph and a snapshot - what does the image say about the subject and/or the photographer. Journalists are much more interested in the subject, while the Fine Artist is much more interested expressing some aspect of themselves. Both are 'artists' but their intentions are different.
Snapshots have use and intent, to create a memory of the subject which can be recalled by those who have actually experienced it and says little more than this because the experience of the subject is so much richer than the photograph ever could potray. For artists, we must portray elements of the subject (be it absolute or abstract) to the audience with limited context - a photograph, as opposed to a snapshot, will be appreciated by those who have not seen it themselves - perhaps moreso than those who have.
I this regard, photographs are objects in and of themselves independent of the subject - we experience artwork, we become an active participant, whereas snapshot we don't.