Your body shape is the key to determining the best way to carry.
IWB always provides more concealment than OWB.
IF your gut is as big as your chest/shoulders, you will have trouble concealing in the front, even IWB. Might work in back.
If your shoulders/chest allow an untucked shirt to hang and cover, meaning you are fit and have a smaller waist, front AIWB is best IMO.
A good thick supportive belt is required for any gun bigger than a subcompact, inside or outside. A dedicated holster attached with a J hook from behind the belt, or snap loops are most secure. Soft, cheap nylon holsters with a steel spring outside the belt hooks are generally considered substandard. Two attachment points are generally better than one.