There's alot of new things going on in the trial lesson from a student perspective. Observing and getting an impression of what it is like to fly is more important than actually flying.
On a side note you'll find instructors
want to teach you in the early stages, so going into lessons with "I did this on flight sim", or, "I read such and such in a book", can actually be counter-productive.
In my experience (I flew with eight different instructors during PPL training) there is no substitute for experience in aviation; the crusty old instructors will train you faster. Younger instructors tend to be more interested in following a set lesson plan regardless of your aptitude, but you should honestly forget about the time it takes you to go solo. It really isn't a measure of how good you are as a pilot. There are alot of factors that will have a bearing on how long it takes.
Best of luck with it!
