and as my opinion l think learning any language it takes time..you will improve little by little n when you will be your exam?

British council ተመዝገብ እዛ ነው ምመክርህ

How much is it gin if You don't mind

Go for it for sure. I'm sure if you practice for 1-2 weeks you'll improve. And you've enough time till the interview since there's a written exam first