Is it a good idea to start  talking with a girl after a year of not talking to her?
Why did you start talking with her after a year?
I failed to make a good impression on her and back then she wasn't interested in me.
It's good to try and reconnect but if she's still not interested then you have to take no for an answer. Some people are never going to be interested no matter what you do.
I need to try harder to make her interested in me
Of course you can try but there is no point in forcing her to like you. In fact, it's counterproductive. You better move on and find someone else who's interested in you.