Could you get a lower chair? An adjustable height office chair can often be found in thrift shops. If the adjustable height device is broken, most offices just toss the chairs, but you and easily set them permanently with a drill and couple of bolts.
My press is mounted on the end of a 2x6 with carriage bolts and wing nuts. When I want to load, I just clamp the 2x6 in a folding workbench.
My chair height is 19". My press height is 35". I am 72" tall and sleeve length is 35". Your dimensions may vary. Try different combinations until you find what is most comfortable for you.
Aside from adjusting the chair (or stool) height, you may think to change the angle of the press. On my single stage that I started loading on 30+ years ago, it often sat inclined backwards at a lower height. But the incline gave me easy access that would have been difficult at that height if it were perfectly vertical.
Good luck. Thanks for asking our advice.
Lost Sheep
edit: GTOne's post pointed out that handle length is important, too. My Classic Turret's handle goes from 45" from the floor (and straight vertical) to 19" off the floor (at approximately 120* angular travel).