As an admin, I'd like to turn on lightning right now, for myself, to become acquainted with it. How can I do that? (it is enabled for all profiles in my org). Then, I'd like to find a user in my org who is more comfortable with change and turn it on for them and work with them on any issues they have. But when I go into my settings and look at the transition assistant, it appears I'm on a path to turn it on for my entire org at the same time. Right now, I'd just like to turn it on for myself, then proceed to my more sophisticated users.
@Martin Johncox , if you haven't created that perm set already -- a nice first step is the Preview feature. It's also available from the Transition Assistant and it gives you a live tunnel to your org in Lightning Experience, without needing to enable any user permissions or turn Lightning Experience on for your org.
Details are here:
https://help.salesforce.com/articleView?id=lex_preview.htm