Ok! I’ll post the videos in the order you should watch them in.

The first one covers how the bottom arm (pushing) should feel and be placed on the pole. https://www.studioveena.com/tutorial/forearm-push-grip-pull-grip-free-838/

Then, have a look at this video https://www.studioveena.com/tutorial/easy-up-split-grips-4-ways-869/ This grip not only required the correct positioning, it does take a lot of strength, so working on the related tutorials will be very helpful. I suggest doing the listed exercises 3 times a week.

Give these a try and feel free to film the attempts and I can then look at it and help you troubleshoot more if needed 🙂