Am I A Terrible Writer?

Be honest Im 13 and really don’t write at all and I did this out of pure boredom in 20 minutes. Lol I have no idea where the stories going and it has tons of grammar errors. Please tell me what I did wrong!
She looked at me with a serious expression plastered across her face, with her eyebrows furrowed and her eyes focused directly at mine. The painstaking silence abruptly ended from her shooting out of her chair like she just one the lottery.
“Life is often mysterious and filled with surprises at every corner, but it’s up to you to decide what to do from there!”
exclaimed the old lady, with a look of determination, her tea nearly spilling from her hands as a result of the sudden jolting movement, and her grey bun becoming undone looking like yarn clinging to her neck.
If only it were that simple. My crazy grandmother had told me this before me and my family moved to this boring old town, I loved her and took consideration to what she said, but still couldn’t find any benefits moving to a town strait out of a horror movie. There was nothing for miles and miles. The terrain was sandy and pale green shrubbery covered the landscape. There were only a couple of houses that looked similar to mine. They all were a murky purple with dark grey shingles. They even had the same structure except for the exception of window here and there. The wildlife added even more to the problem. For starters there were tons of mosquitoes and coyotes were rumored to visit the town from time to time.
I sighed and looked out the window hoping to find a change of scenery, but sadly the same ghost town awaited me