some C&C
#1- good overall, need to adjust your workings in PP on the sky in the middle, not natural, the slight gap in the left trees shows this.
#2- post processing miss or mistake with the green artifact in the center, could be an artifact result from glare, but i couldn't say from not having seen the individual exposures
#4- you blew out the highlights for the white balance in the rear, so need some work on that exposure.
good job considering your first go.
noticed some blue fringing on the left bottom edges in the background of the last 3 shots, simply a choice in lens better lenses correct that.