Pretty fucking stupid though that they tell first-timers to do shit like that though, there are about a dozen ways to get injured doing such a move for someone who is untrained and uncoördinated.
I know, but there was nothing stoping me from not trying it, so I guess it's my fault. Should have stuck with simple backrolls.
Anyway, the ankle is itching already, so I guess it's stabilised and started healing. I was also a bit worried that it would turn blue and all sorts of colours, but it's just red from blood flow rather than ruptured veins, so it's not too bad.