Hello Mary~ below you can see a corrected version of your introduction post. I hope it will be helpful to you.

Green - explanation

Orange - a word I believe should be in your text

Red - correction

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First notebook entry: Introducing myself

I'm a gril girl who likes food and shopping. Now i will have I will now start the last term in my university and prepare to find a job after graduate graduation (in this case you should use the noun graduation instead of the verb to graduate).My eEnglish is very poor so i I want would like (this sounds much more polite when you ask for help) you to help me to improve it. I know it maybe is going to be a little difficult but i I will try to learn. Happily I am happy to meet everyone here, and I hope we can become good friends (you + someone else make two so it is plural and to make plural of friend you add s).