Tooltip to help people on first use

[kakounet]

Hi !
Firstly thank you for this really simple and yep powerfull app ! I stopped using framadate as soon as I discovered your app :)
I use it for work and I have someone that failed his first use :
"Thanks for the invitation. However, when I log on to “Crab fit”, I can see your availabilities, but I can't select one... When I move the cursor, I see the little window with the schedule and who's available, but I don't know how to select."
(I answered him to clic on the "connect" button with his name)
I think what blocked him was the "connect" button (it makes think about a complex sign in registration), perhaps what could have helped him is a tooltip that says somethink like "Put your name here : no account creation, it's free :)". Or perhaps to hide the group disponibilities while the user is not connected ?
Thanks again !