The science of the Kabbalah teaches us the unity of all worlds and the equality existing in them in everything that reveals itself up to the highest level of the qualities to the Creator, and it teaches us to develop in this way and how to avoid mistakes in this world.
This wisdom is no more and no less than a sequence of roots, which hang down by way of cause and effect, in fixed, determined rules, interweaving to a single, exalted goal described as – the revelation of His Godliness to His creatures in this world.
There are no limitations on studying The Zohar because it is mostly Midrash (commentaries). The Hafetz Chaim used to invite everyone to study The Zohar of that Parasha (weekly portion of the Torah) every Shabbat, even unmarried men.
Redemption will only come by means of studying the Torah, and redemption is primarily in the study of Kabbalah.