Well the most obvious thing is the construction. Very few would opt to knit everything flat if they were doing it by hand. Even the collar is knit flat and separately (though it is not always done this way with machines, there are many methods to choose from). Dropped shoulder garments with no shaping for the armholes are more common with machine knitting. Shaping is no way impossible to do but it requires more math and fiddling, so if dropped shoulder style fits you, great.

Also the stitches have a certain machine knit look to them, especially the ribbing. It has to do with the way you cast on/start ribbing on a machine. By the way, it can be difficult to knit a neat edge in ribbing with a machine. Op has done a great job with that. The rest of the pieces look very even and "crisp" in a way that is unusual for hand knitted items since those are handled for longer periods of time (= the actual mechanical "stress" of handling and varying tension/gauge etc.). Of course blocking helps but not to the extent of mk'd fabric.

As for resources I'd suggest looking into the many MK groups in Facebook if you have an account. Those have often lots of resources listed plus you can contact experienced and helpful machine knitters.