A food counter attendant can not apply for PR under CEC because it's not a skilled job. You can not apply for PNP by yourself, you need the employers help. You can apply for FSW if you qualify, that is if you have enough points for your education and work experience to apply. If you can't apply for FSW, you can try to find a new job, either a skilled job that will let you apply yourself or another food counter or similar job where the employer will apply for your PNP.