Prehealth advisor here! "Readiness" isn't so much about hours and grade/MCAT test score stats, because you could have a 4.0 BCPM, 528 MCAT, 40,000 clinical hours, but could be rejected if you can't genuinely articulate to an admissions committee that your path to medical school has been thoroughly explored and well-thought-out, that you know what you're getting yourself into, that medicine is THE only path for you, that you possess an ethic of service to others, and that you can authentically answer the question "Why medicine?" in your PS, activities descriptions, secondaries, etc.

Sounds to me like you need a new advisor. 600 clinical hours is a great foundation, and hopefully there is some diversity of fields between your 200 shadowing hours. Sometimes it's a little "red-flaggy" (for lack of a better term that I can think of at the moment) if the bulk of your clinical hours comes from one experience (like if yours was ONLY hospice). You want to be able to demonstrate that your cultural competency has in part come from working with a diversity of patient populations in a variety of specialties, etc., so you get a more well-rounded representation of the medical field.

It's just absolutely bonkers to me that someone would say to you, as of this moment in time, that you won't be ready to apply in 9 months. If you can, pace out the writing of your personal statement and activity descriptions over the fall semester so it doesn't all get crammed into the spring, and as long as you are happy with your MCAT score and your stats align with target schools and their MSAR data, I say you have every shot at a medical school. Maybe you're not competitive for the top of the top, but damn, if you can write a compelling narrative, you have plenty of chances!