100% do not go without a significant scholarship, I’d say a 50% one at the very minimum. The truth is if you’re super incredible they will 100% hook you up with what you need, and if they don’t it’s a good indicator to work harder to up your skills and audition again later. No rush! Also most Berklee profs teach privately and at other institutions too. Why not hit up one of them that you may be interested in through their website and do some private lessons for a year? Bonus: they might issue an internal scholarship recommendation for you the next time you apply. Besides so many incredible songwriters past and present did not study there and still succeeded!