There are a variety of ways to do DB presses, one or two arms. Including different hand positions. and overhead paths the DB takes..
Knew a guy from Italy (trained in San Diego) that sat flat on the floor, legs spread out in front of him, and did two arm DB's that way. Around the 105-115 range if remembering right, 10-12 reps. Some have done them from a kneeling position, trying to take most of the body English out of the movement.
Might suggest the one arm DB press while standing. Bracing the free hand against a supporting object. More focus and attention given to the exercise that way. And the possibility of using much more weight on the DB. Can try it strict style, but most give a bit of a knee action to start. Your choice.
Though not for most the One arm DB side presses (not to be confused with regular DB presses) are another advanced way of pressing. Your pressing up, and as doing so, the body is bending towards the opposite side slightly. Not usually bracing with the free hand. Something like the old bent press, but not to that extreme. This can be a mass and strength builder for the whole shoulder girdle. If using 100's with regular DB presses, you might find yourself doing 110, or so, for good reps.
In the 60's and 70's DB overhead pressing the the big thing for delts. Still a good way to go.
Good Luck.