It's tricky, because you don't necessarily know what will work best for you until it works for you iyswim!
I've read other oral sex threads on here and what a lot of posters say works best for them is definitely not my preference. For example the pointy tongue on clitoris I don't like at all (it's too intense, like being tickled in a way that's almost painful). I've also heard a lot of women like their clit gently sucked but again I'd hate that for the same reason.
For me I LOVE a flat tongued approach, long, firm sweeping strokes from the vaginally entrance, up the inner labia and ending at the clit, then repeat as required!
I would say a massive part of the experience is the male partner obviously loving what he's doing. Little kisses down the abdomen as he goes down builds the excitement, kissing the genitalia area over the knickers and then gently removing them, then kissing and caressing up the inner thighs before actually touching you, then gently parting the lips with his fingers to "get to work " properly. The guy I mentioned above clearly really loved "going down", was obviously turned on by the sight, smell and taste (and my pleasure) which meant my self consciousness vanished pronto.
I also really loved it when he would slide a finger into my vagina and move it in and out when he was licking. The penetrative feeling really added something wonderful to the experience.
Sometimes we would do it with me sitting on his face and he would play with himself while we did it. I found that really hot.
But you might hate all of those things! It's really hard to advise. And it might be that however good your partner is at it you might still be one of those people who isn't keen on receiving! That's fine, you don't have to.
But as you seem keen to try it out a bit more I'd suggest saying to your partner you're not sure if oral sex is really for you but you'd love it if he helped you "experiment" to see if slightly different approaches work and suggest a few things. Hopefully he'll be delighted with the idea!