i have my girls start this from the floor, kneeling. put your hands in position, and work on engaging with the push on the bottom arm and pull on the top arm (really keep your shoulder down, engaged, and away from your ear) until you can hold your weight enough to slide your knees up from underneath you to land softly on the balls of your feet. does that make sense? a lot of times people don’t realize how much you have to really engage that top arm. instead of just hanging off it, you are really pulling the pole in towards you, and counterbalancing that pulling force by pushing against the pole with your bottom hand.
make sure your lower arm is in neutral alignment, and that you don’t have your elbow hyperextended, that’s a realy easy way to put a lot of stress on your bottom forearm!