Get a channelled reading
The ideal way to find out is to ask Michael directly. That is, to get a chart or profile reading of your essence and personality (or “overleaves”) from a Michael channel.
Your essence includes your soul type and soul age (plus casting), while your personality or (or “overleaves”) are your current life’s personality traits (goal, mode, attitude, centering, chief feature).
Here are some channels I am happy to recommend at this time based on personal experience:
There are many others — I just have of no personal experience of their readings. See for example:
Read and reflect
Another way is to just use your own intuition and judgement. Read the descriptions here and elsewhere, look at the various photos of faces, reflect on how you are in life, maybe ask family or friends for some input, and see what resonates the most for you.
Try to be very honest with yourself and go with what actually feels true, both true to you and true of you.
That said, it can be hard to really know yourself until you are around 35 or so, because until then most of us are still immersed in the false ideas of our upbringing, our ego, and/or our culture. (For example, I’m a Mature Scholar, but at age 20 I would have assumed that I was a Young Artisan because I was so hungry for the fame and fortune that would surely come from some as-yet undiscovered creative talent.)
Things gradually become clearer as you get past 35 or so.