This is destined for NEPRT anyway, so what the heck?
I'm 145 lbs, and 70 years. I can get it up even when tired. It's technique for us non-rotundly challenged people. Weight helps, but if I can do it, anybody should be able to.
Left hand on left handlebar, right hand on hand grip under the seat.
Face the bike, ball of right foot on stand. Push stand to the ground.
Keeping stand pushed down, push bike away from you until you feel the other centre-stand foot touch the ground.
Now lift left foot off ground, so all of your weight is on your right foot. Use the right hand simply to maintain your balance.
This is the bit that's difficult to explain. Bend you right knee, push yourself up a bit, then drop by bending the knee, as you come down, straighten your leg so forcing the centre-stand down. Best analogy I can give is trying to burst a ball under your foot by first stepping on it, then bouncing on it. It's a smooth action, no jerking required. My old joints won't take any sort of jerking these days.
Make sure you're on level ground, and don't do anything with your left hand other than keep the bars straight.
The right hand may lift a little, but it's really only keeping your balance. Lift too much and it may push the bike over as well as strain your joints.
Confidence that the bike won't fall is one issue. If necessary, get a bike-savvy person to stand the other side to catch the bike if that gives you the confidence to try while you practice.