When your tongue hangs limp and flat, it provides a soft caress. When your tongue is flexed and rigid it provides more direct and firm stimulation. Try some of each and determine which your partner prefers. Some women will want rapid motions of continuous licking while others prefer long, slow caresses. When a woman becomes sexually aroused her vagina balloons and her uterus rises.
Women often enjoy the feeling of penetration during oral sex.
This penetration can be well lubricated fingers or a dildo. Gently follow the natural curvature of the vagina for smooth entry. Some women will want a pumping action while others will just like to have the fingers or dildo inside of them.