Check your resume- Everybody here is right in saying that people will instantly turn you down if they see tiny mistakes in grammar or spelling. Hand out a copy to your family and friends and ask them to check it for you. My mum always picks up on things everybody else missed. Little things like From instead of Form for instance wouldn't be seen by a computer. Sit there and read it slowly, one word at a time like a kindy kid, just to check it all makes sense.
Consider a cover letter- I know some people see this as old fashioned, but it does show effort and desire for the job. If you can personalise each one (ie. instead of saying, I want to work here because , say I want to work at Myer because) and edit it for each job type. So for a waiter position (like restaurants) find your skills and attributes for those in that letter. For say, clothing sales, list them for that too. It doesn't make you look as desperate for a job because you've put more effort in. And hopefully that is an attractive attribute for employers!
Dress sharp!- Wear a nice business shirt and pants and hand your resume in personally to the manager. You'll stand out from somebody who shows up in a T-shirt and jeans. Wear the same style of clothes to an interview. If it's in a less formal business (like Mcdonalds) don't worry about things like a tie, but say you applied for an office job, then a tie is the way to go!
And don't let the lack of experience let you down. A desire to work is essential, and you have that. List some of your skills as being things like quick learner, good interpersonal relations like speaking with customers and punctuality. If English isn't your first language, emphasise the fact your bilingual abilities could be great for assisting customers!
In interviews, always always talk clearly. If they ask a question which has an obvious answer (Why do you want this job, where would you see yourself in three years, are you an introvert or an extrovert) always say what they want to hear. You want this job because you think its a great opportunity to be able to study as well as gain valuable life experience, in three years you would like to balance study with a good career (LIKE BEING THE MANAGER IN THIS ESTABLISHMENT) and your an extrovert because you love meeting new people (it makes you happy to see people happy.) Customer service is something many business's pride themselves on, and if you can show a desire to bring that it's a great asset. Maybe mention a time you went to a shop and had bad service and was disappointed, so you know how it feels and you didn't like it, that's why you want to deliver good customer service!
And smile. Try not to be nervous.
Good luck!