Play the instrument.
Singing is playing an instrument, what works best to play that instrument, optimally, efficiently, engaged but not taxed. Prepare the instrument with lift of soft palate, drop of larynx, filling the body with breath, cord closure, placement, and resonance bolstered with support and control. That is singing, the melody must be sung like a sigh but (usually) crisply with notes, words, musicality, and artistry. Train, prepare, play, connect, support, and give - that is singing.