Open doors

One month before traveling [Just in case you are particular about British English, the British would usually spell this word as "travelling"] to London, I got this pleasant feeling again. I imagined myself surrounded by strange people, listening to this language which turned I had become familiar with after my Erasmus stay in Finland.
Crisis seemed a barrier which I wouldn't be able to face when finishing my studies. Now I feel that I've got a better alternative than that emergency door. [The sentence is not grammatically incorrect, but you have made an allusion to an emergency door, without really making it clear what it refers to.]
I feel able to draw chart my own path, become wiser and overcome my fears. Just as that day when I jumped to dance simply began to dance/ broke into a dance, with without any idea of steps or rules.

Hopefully, someday I'll repeat those dancing lessons in Finland. Maybe CAE may will allow me to achieve this dream...