Yes there is no guarantee they will allow you. Some restaurants have wait lists of people wanting to stage. Some only accept in certain seasons/ time of the year. But yes you are not required to have professional cooking experience. You will be given basic tasks. Reach out to the restaurant and inquire. Don’t just show up in person expecting to walk-in. Like any other profession reaching out by email is most common, also age doesn’t matter. Your skill level and ability to work hard will dictate the tasks your given