You have to make a guide for your text...
Why is you mother important to you? What has she done that marked you? Do you remember any special occasions where she made you feel special or loved or something like it? Think about it.
-My mom is the most important person in my life. I don't know if I will ever be albe to express what she means to me with words. My mother is not my whole life but she is the largest part of it. She is not just another woman, she is extraordinary.
(I believe it would be a little better this way).
You can say that :
- Her love is like a warm sun that makes you feel secure ; that she taught you most of the things you know today; that she is like a bird that took care of you and then taught you how to fly.
You should reflect a little bit more about your ideas before start writing. What do you think?