Real self = Real selves. You need to understand that humans are naturally adaptive. Just because you don't always behave and communicate the exact same way in every situation in your life doesn't mean you're fake or being someone else.
We all have Multiple identities. For example, role identity, racial identity, work identity, etc. The way we interact and communicate under one identity will be different from others. Finding your genuine self and express that effectively in these various situations is what you can realistically work on.
I'll tell you what I am right now -- Real happy I found this question. Thank you to whoever thought to ask it! Few things matter more to me than being real in myself. I struggle with that every day, running that test, or, said another way, asking that question: Am I being real right now? True to myself, not acting on my fears (even if fearful), centered, kind, thoughtful. I work to release my resentments at the end of every day and assess what I can work on tomorrow to be more present (that's what I call "really real," the ability to be present). This is the work I do with founders, C-suite businessfolk, parents struggling to maintain some balance between the realities of work and family life. If you are interested in being more "real in your self," please get in touch.