[When Bava Sali came to Yerushalim on on of his first visits and people came to him to get a blessing he told his gabai [servant] not to let any kabalist in.]
My approach to Halacha is to learn Gemara and to depend on דינא דתלמוד the law of the Talmud. Only after learning the subject in the Gemara itself does it make sense to me to look up how the Tur Beit Yoseph understands any given subject. There are no short cuts. And see the Nefesh haChaim "אין לנו אלא דינא דגמרא". "The only thing that matters is the law of the Gemara." He wrote this to a rav that he knew had made a wrong decision.
The thing to be careful of is religious people that use the appearance of Torah to hide their cults.
In any case to come to fear of God which is one of the major goals of Musar is not solely by learning Musar but Physics and Metaphysics also as the Rambam stated clearly in the Mishna Torah and the Guide and hints to in many place. Musar is important but to the Rambam it is not the real source of fear of God.