Thinking that there is a "real you" that you haven't attained yet is detrimental, it's and endless quest. On the other hand, if you think you already are the "real you", what does it mean ? That you'll never have to update your values/knowledge/logic ?
That's a deeply personal / philosophical concern.
Read philosophers' works and go with what feels natural to you, virtually anything you'll ever ask yourself has been written about. What you need is a framework, not a questionnaire or a method.
Meditation can be nice but just taking a few hours off without any distraction (phone, music, screens, etc ... ) will give you plenty of time to think about what really matters to you.
You might be interested in Nietzsche and his "Become who you are!", a good intro could be: https://www.artofmanliness.com/articles/podcast-480-hiking-w...
Checkout Seneca and Marcus Aurelius too, very easy and down to earth advices. Nietzsche will probably be harder to get into.