New to writing and troubled with its progress
Once you have your story down on paper, you can always go back and make improvements to it. I'd recommend you to post your work here. It's really motivating to have people read and give feedback on what you're working on.
You will receive critiques, insults, lots of hate, sure. But also lots of love and support. I did, and I had the same worries as you. So many others lived a similar story. We grow together here.
To put it simple, if you don’t write and post there will be no way to know if someone would like to read your work. I have learned a long time ago that family and close friends are not exactly the most reliable source of critique.
No matter where you upload your work, there will always be trolls. They live on the internet now, not under bridges. As others have mentioned, it is important to learn to differentiate honest critique from trolling. If 10 people say that your work is good and 2 believe it is the worst piece of garbage ever written, I would say that you have two regular trolls. If ten out of ten people say that your writing sucks, then they might have a point. But even then, this does not mean to give up. The best way would be to improve your skills, correct your work and proudly show to the whole world that you can learn from your mistakes.
It is impossible that everyone will love your story. I don’t like Twilight but it still does have millions of adoring fans. You have to find the balance between following your readers’ advices/wishes and standing your ground. You write to be read. And yet, this does not mean that you have to re-model your story every time someone does not like the table manners of your characters. Your story and characters have to be logical (even in a fantasy setting) but they have to be your own, not tailored to fit anyone’s tastes.
The most important thing is to love your story and characters. If you find your own story boring, it becomes evident in your writing. And it also becomes plain evident to your readers.
Now, grab that keyboard and start typing. There is a whole world you have to share with your readers!