Hmmm, I see that you have the problem of asking for admission even though your record is not as good as you would like. Generally, if one is going to claim that one will do better in future than the past record would indicate, one needs to give some reason or evidence to back up that claim. What led you to be not as strong academically back in high school and in your first term at college? What has changed? Have you done well in at least one semester of college? If your records are not strong, it's good to address this directly in the personal statement, but you must find some way to convince the reader that you are now ready for work at an accredited university.
As to the rest of the essay, I like it that you begin with your childhood interest in science and with your grandmother. Here, as elsewhere, you will need to make sure that your sentences are complete and properly punctuated. For example, you write
It has always been apparent to me especially after the death of my late grandmother.
There needs to be a comma before especially, but -- more importantly -- what "it" is must be specified.
In the second paragraph, you say "past times." I think you were thinking of "pastimes," which are the things you do, not a word to use for the time itself. Probably, you mean to say "free time."
But, here is the problem: These are not the kinds of leisure activities that are relevant to your academic interests or show broad curiosity about the world. If you had a hobby that was related to science, that would be something to mention. But playing video games and taking walks, while fine things to do, are not the kind of things to mention in an admission essay. Instead, tell us more about "volunteering."
In short, choose every word wisely with the aim of making every single sentence make you look like the kind of student who will succeed at that university.
Simone, EssayForum.com