Can tantric methods be learned casually?

Tantric can't be learned casually. For Tibetan Buddhism, tantric Buddhism is a higher Buddhism that the Lama can learn only after practicing the immortal Sect. Generally speaking, it takes several decades to practice Xianzong, and many people have been practicing Tantric for half a century.

Tantric Buddhism refers to Buddhism taught in secret by the Tathagata.

Tantric practice is basically divided into four stages, but it is not convenient to disclose what it is.