I like the first sentence, but I would add a comma:
Though there are many people who influenced my values in my life, I believe there is one person who showed me a lot more than the rest, and this ....
Another important value that she has taught me is if I am going to start something then I have to complete it. --- for each thing she taught, it would be good to SHOW with an example of something she did or said. Let the reader figure out that she taught you each value. Let the reader see examples. ("Show, don't tell")
You should cut off the meaningless part
Though there are many people who influenced my values in my life,
I believe there is one person who showed ...
Is this all one paragraph? Write some paragraphs. Make each paragraph about a single idea. For every idea you write about, start a new paragraph, and start that paragraph with a topic sentence