As a new writer, I'd say the most important part is just getting started. Don't be afraid to put your ideas down on paper, even if they're not perfect yet. The first draft is never going to be perfect, so don't put too much pressure on yourself to get it right the first time.
The more you practice, the better you'll become, so don't be afraid to make mistakes and learn from them. Just have fun with it and don't be afraid to experiment and try new things! You know, you might just write a story that you never imagined in your wildest dreams." -..