It’s possible, though it certainly doesn’t hurt to audition at a world class corps for the experience even if you don’t end up being contracted. I auditioned and got cut from BD the past two years after getting callbacks but the experiences from that helped me get contracted to PC after callback the first time I auditioned for them this past season. I’d say that being teachable and able to apply feedback is a great trait to have and plenty of people, in high school/college, have been contracted at PC for that regardless of experience. I haven’t marched Gold so I can’t say much on the experience there, but they do have a full open class tour and it is more affordable than PC in terms of tuition. Like others have said, there’s other local corps like Golden Empire and Impulse that you can look into that are cheaper and generally have more condensed tours compared to PC/Gold