When I was at the nec last month I came across a stand called secret lashes
SECRET LASHES UK - Eyelash Extensions Semi-Permanent Lashes
They have a practice head on the above link, now, I've not done a lashes course, I bought some x tweezers from them and got given a face masque which was pretty darn good, it was a lash lady who told me to go there, she says their stock is really good, delivery brilliant and customer service is great. I mention the head because I know how useful my training hand has been, they don't get tired don't blink, sneeze need coffee or the loo. So the head might be the way to go?
As I said, I haven't done the lash course, but I have had to learn how to put cluster lashes on, could I hell as like get the hang of it, college client told me to get a cheep set of false strip lashes and practice putting cluster lashes on them and it worked. So maybe that would help, if you anchored the strip lash into blue tack to keep it still then you could work with both hands to add the single lashes?
Hope some of that helps, it's something I really want to do so please anyone who has tips or who finds what I've said does or doesn't work, could you put it here, for my research as well as others