When do I turn the transponder on? Before contacting ground or only once I got taxi?
Ground to Tower handoff. I assume I was supposed to switch to tower myself, after taxing to the runway. I thought frequencies are changed only on instruction? Is that official practice at all airports or SNA / PE specific?
I was asked to report midfield, but had my difficulties getting through sometimes. Once I'm beyond midfield, I just report current position, right? "Abeam the numbers", "turning base", etc. What if the tower clears me for the option before I get through? should I report the position as part of the clearance readback? I kinda doubt the tower is still interested in it.
If I approch an airport from outside, the tower might give me instructions on where to vacate the runway. If I'm cleared for the option, I may stop, but the tower doesn't really get a chance to give me such instructions. So I just took the next taxiway. What would be the procedure if the tower had some strong opinions on where I should leave the runway once I'm done with my touch-and-goes?
After taxing back to the ramp, I just turned the radios off. Was that wrong? Shouldn't I get permission to leave the frequency first?
Also, at SNA from east ramp, why A-H-C to 20L at K? Why not the full runway and why not just stay on A? I was expecting A-L and was totally thrown of balance (it didn't take a lot). The poor controller had to give me the taxi instructions three times before I got it right

I clearly have a lot of learning to do. Many thanks to the patient controllers, expecially the one yesterday 9-10am. I'll do better next time

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Stefan