drowningbitbybit wrote: I like to make sure I end every wave with a throwaway move - I know I
probably won't land it, and I'll
probably just look a twat, but you learn something every time... even if it's just not to try that again

I bet you stop doing this when your new board arrives!
To the OP re bottom turns - I have had a long and gradual progression since I started surfing (only 6 years ago) to the point now where I'm trying to do the right type of turn for the wave every time.
2 points that helped me:
- stay crouched after popping up till you initiate the bottom turn, and you will have more speed and energy to make it along the face.
- look and point at where you want to go on the wave, and you'll suddenly be there! This means you don't need to try and turn by leaning or planting your weight back or forward, but will subconsciously just do it correctly. Trust your body to take care of all the balance and rotation and concentrate on picking the place you want to be on the wave.
Of course this all depends on how quickly the wave is peeling, and how steep the face is, but it's what I keep reminding myself to do if I start missing waves after the drop.