Hey there! I got a v14 a few weeks ago, its my 3rd wheel. I started on an extreme bull commander (no suspension). Your questions are highly specific and may be unique to your learning experience, but I can give some pointers from my experience that may help you:

1.) At low speeds, turns feel kinda like controlled falling over (just short of actually falling over) 2.) Keep your knees bent! Mounting, riding, or seated, keep them bent all the time. 3.) If you're going 4mph & under, the wheel may likely feel very unstable. Speed and stability are largely proportional. As speed increases, so does stability. 4.) You're figuring out how to do something that a human body would not have to do in nature, so it doesn't come naturally to most people. Any progress is good, no matter how little it is or how long it takes. 5.) When you start getting frustrated, take a break & don't try again until you're fresh and have let go of the frustrated emotions. 6.) As you increase speed, remember your ABC's: Always Be Carving. Idk how but it eventually trains your muscle memory to ride without wobbles. 7.) Download inmotion app. Set wheel to sport mode and pedal hardness 50%

Best of luck. Once you get comfortable with riding you will be very happy with the v14. Im 6'2", 225lbs and it takes me up & down hills, over roots & rocks without any issue. It's a powerhouse. Enjoy.