I realize that you are asking from a Catholic perspective; in your letter to me, it seemed you were boarding on becoming Jewish. My mistake.
If you were told that Kabbalah is black magic, commercial none sense, or anti-Torah, what can I say? That’s the wrong message. Kabbalah promotes things which are positive paths in Torah, not negative ones. The study of Kabbalah adds depth to our Torah, not take away from it.
The mingah is that one needs to be over 40; this isn’t so. One does need years of Torah study, but really, it can be any age, any time, as long as you have a teacher with you - don’t do it alone, Rav Akiva warned so, and if you think I’m wrong, his pupil, Rashbi, wrote most of Zohar.
So is Kabbalah dangerous? If you plan on staying a Catholic, stay away from it; it’s not your tradition and will only confuse you. If you someday contemplate the notion of converting to Judaism, what can I say? Would I tell you not to marry the love of your life?