I don't disagree, but curious to hear what you mean exactly. I try to take as many photos as I can and in different settings, try different things. Been reading Minor White's book about the zone system. Also been reading about composition and framing. Part of why I started developing and doing my own printing is to improve my skills. I want to be in touch with the images throughout the entire process and oversee it all. I also think that these formats were really made to be seen printed on photographic paper. Good prints look almost 3d like. This rarely if ever comes across scans.
Sharpness itself does not make an image, even if in many cases it contributes to viewers' experience.
Seems like you have a good thing going. And Zone System is fine to know, but do keep in mind lack of its use has not prevented great images from being made. it may be too much for the time being though. I would suggest checking out your sources of choice to evaluate images, which ones speak to you, then trying to emulate them. Eventually this process becomes ones own and from trying to copy someone else, it becomes intuitively own.
Digital, that includes phone camera, are great in making a faster self-development of photographic eye possible.
Quality difference between 35 and MF is naturally there, but not all MF cameras will give experience that is going to be helpful to everyone. Their ergonomics alone may help or be a detriment. Important to handle one before purchase, or get one with return option, or as others have mentioned, there are some safe choices that will not devalue within next few years but selling back may not be as easy as it seems (I'm no longer sold on film's hold though, so am not so sure film cameras will continue to keep their value for more than next 3 years)
Folders look good, mostly work fine, but many are used in zone focus mode, which puts sharpness in the chance department. Older folders (especially) can easily have optical path out of alignment, which throws out any effort in trying to be as precise as possible when focusing it. Then outcome is not as sharp and when sharpness is the goal, disappointment may be next.
Hence my point, sharpness is not something to focus on as much, certainly not beyond reproach. It is still a key element in getting framed image come out as intended, but lots of sharp-crappy images have been made that left lasting impression on most everyone who has seen them.
Try to separate sharpness from overall look of your images. Take the two on separate but parallel paths. Composing as one and key element, then seeing how change of focus point may have made it better, if at all. Eventually these things will converge as your photographic eye matures.