I am a new Surfer from Germany and started just last year. I am 50 years old and started surfing to join my daughter, but now got hooked myself

I have no problems getting into the lineup with 5 foot waves with my 9ft longboard, turtle roles work well and I have significantly improved in paddling power and efficiency.
My main struggle is with the takeoff. I works well on the ground, But after paddling, I feel I am not fast or strong enough to jump into position as needed (always come short, and then stall the board), and also feel my aged back in that process. I know I should be working on Core strength and fitness (and I do), but in order to get more waves soon, I want to try the two step Takeoff, where you plant your back foot first and I have seen some fluid takeoffs that way.
Now I have seen two versions. One is the "Chicken Wing" Type as described here: https://youtu.be/TFhQ6kdDmfE?t=4m6s. Here you position your back foot while still lying on the baord. That does require some body twisting and means the back foot will initially not be on the center of the board. The other is more along what I read as "Aussie Sprinter" like here https://youtu.be/yXTrMU3JBCM?t=2m24s. This seems faster to me and the back foot has a better chance to land in the center, but mabye it is less precise?
What is your view on these two versions, which one would you recommend? Thank you for your help!
Cheers, Lars