It is brought in Maseches Avodah Zarah first that one must not refrain from learning from multiple rabbonim, that such a person will lack simon brocho, sign of blessing. On the other hand, another opinion states that one shouldn’t learn from too many rabbonim, at least when it comes to Gemoro, since this can lead to confusion in girsa, the wording in learning Torah, which is important to remember; this we know from various places in Shas where a Tanna or Amora says a halocho in an archaic language, when the reason is asked, it comes out that it’s because this is the way that the rav in question learned it such a way from his rebbe.
In our generation we have two extremes of people: those who maintain that a person must be an absolute adherent to one group, and those who maintain that absolute eclecticism is a good way to lead life. Neither group is right. According to the Gemoro in Avoda Zarah specifically, it is a terrible thing not to learn from different rabbis. It even says in Avos that the wise person is one who learns from everyone. There is a way to balance this though. When it comes to the key aspects of life, the practical things, which the Gemoro is mostly concerned with communicating to us through halocho, we have to have a consistent path. Halachic practice and minhagim must be formed through a steady tradition, whether that be Kabbalistic in the line of the Ari, Sefardi, or Ashkenazi, the minhagim must be consistent. Rachmono litzlon, many people these days have completely lost the minhagim of their ancestors, beautiful and precious minhagim going back thousands of years. Now we have a cookie cutter form of Judaism for the most part, Hashem yishmreinu v’yatzileinu (God protect us and save us). However it is crucial to have a consistent approach to halocho and minhag, this must remain constant through all explorations in the other aspects of Torah.
Through learning various works of Chassidus and Kabboloh, such as Tanya, Sur MeRa V’Aseh Tov, Derech Hashem, Messilas Yeshorim etc. we gain valuable insights that need to be used to enrich our daily lives. If the entire structure of that world is sliding around constantly, then the Light and Kedusha (Holiness) that those rabbis wish to impart to us has no place to rest. So my advice in regards to all of this is to accept an approach to halocho based on Shulchon Oruch primarily, Beis Yosef and Rema. Once life is established around this, then growth can occur. Just like growing a garden can’t happen without good soil, so a person’s spiritual growth can’t progress without a “soil” of stable, established, halocho. Rebbe Nachman said Breslov minhag was the Shulchon Oruch, and I heard in the name of the Belzer Ruv the Sar Sholom that the minhag Belz was Beis Yosef. From there exploration into various minhagim, guided by one’s leanings in ruchniyus, can occur. The key thing is l’chaven liboch laShomayim, to direct your heart to Heaven, to paraphrase the gemoro in Brochos.