Writing Feedback / Retail cashier job - my very first job experience [3]

Hi every one I am currently working on my essay and I know that I need a lot of feedback from the experts. I am always having trouble with my grammar, sentences, and punctuation. I really need this essay to be done as soon as possible. Can anyone help me revised my essay?. It would be much appreciated if someone would help me. This is my essay.

I used to work at MCCS Exchange in 22 Area inside the Camp Pendleton, I work there as a cashier. I remember waking up so early while my daughter was still sleeping, I will grabbed all the things that I need and take them with me in the bathroom so I can get ready for work. A blue polo shirt with MCCS logo on the right sleeves, a black pants, and black shoes is what I used to wear as our uniform. When I got the job I was so very happy because this was my first job. I can still remember the day when I went to the HR office to apply for a job, and that I got interviewed the same day, and got hired the next day. I really felt so blessed that day, because I'm not just having a baby, I'm also having a very first job. I have learned so many things while working as cashier, things like you have to be patient when it comes to a very bad situation, like I remember there's this marine who approached me and ask me, "Where is your manager?, I need to talk to her right now." I said, "I am sorry Sir, but she is not going to work today." And he yelled at me, so I went to the back room and called one of my supervisor. I was scared because I don't know what was going on. But on the other hand I still love my job, and I still wanted to serve those people who also serves for our country.