I managed to enjoy a session despite the presence of an idiot family of inconsiderate, entitled people.
I got some good tips from my daughter, who is an excellent skater but not a coach, about where my weight should be (more heel than ball) and how to achieve that (flex the foot, toes should be pointing up not scrunched down) - should lead to more secure edges (for me at least). Struck me that the required patience and relationship to get to this point (me asking her to show me stuff, me fiddling around with stuff, her watching me, me asking lots of questions) may not always be present in a normal pupil-coach relationship, at least not for floppy, hopeless adults like me. The knowledge is there, but is the willingness?