To succeed in the service of Hashem requires a step-by-step approach; there is no magic.

Afflicting your body and fasting is not the norm, so don’t seek out crooked ways. Instead, follow the path that has been tread by many. Generally speaking, follow the Tanya, especially chapter 27, to avoid becoming despondent. https://www.torahrecordings.com/rebbe/igroskodesh/011/009/3529