I'll chime in with 30-odd years (some odder than others) of sexual experience here.
The things that I enjoyed doing as an adolescent, and the things that I enjoyed doing as young adult, and the things at I enjoy doing now are not all the same. Our sexual appetites change from year to year, from day to day, even from hour to hour. What you might enjoy thoroughly with one man, you might find rather bland with another.
The important thing is to communicate. Don't be afraid to tell a partner that you're new at this, and that you're still finding your way. Don't be afraid to say, "I'm not really enjoying that." And above all, don't continue to do something that makes you feel uncomfortable.
Sex is not an obligation, and if you persevere in an activity because you feel obligated to do it, then you may be reinforcing a negative view of something that you might otherwise come to enjoy, in time.
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--James