The way to get a longer ride is to use more of the wave face.
At the moment you're racing down the line, but, as you said, you need to work on extending and compressing to get more vertical.
Look to the lip and pass the coffee there as you extend, then compress down the wave.
Also, if it's suitable for your skill level, try using a shorter board that can turn quicker.
Commented on I've got MRI shoulder Report back. 2 ...
28 Apr 01:43
But apart from that, you're fine...? 🙃