My main problem was that taking the cock into the back of the throat means stimulating the gag reflex. I practiced with a silicone dildo and finally avoided that sensation. Certain positions make it easier. For me, the best way to deep-throat is when my mouth and throat are aligned in a straight line. For beginners, a good position is to lay flat on your back, with your head hanging over the edge of the bed and the bull standing with his cock at your mouth level.
Do it slowly, stay still while you gradually take him in, breathe through the nose and if he wants to fuck your mouth, it is useful having a signal (like a safe word) to let him know that you need a break. Deep throating is an intense and intimate act, in which a lot of mutual trust is needed. However, it is intoxicating to be able to show off how deep I can take a black cock. It is a point of pride and empowering.