Thing is if you've never worn it, I think you need to experiment - does your budget stretch to £20 on the cheapish lipsticks (Make Up Academy and Sleek in Superdrug are both excellent) and see what works? Try one "nude" coloured that seems to look nice on your hand, as people's idea of nude is different, one pinky one, one browny/orangey one and one pillar box red one (do not fear the red) and see what works? NB I am caucasian, people with dark skin could recommend a different set of basics.
One or possibly two of these will be, YES!, the others will be argh, I look dead/like my mother/like a 5yo dressing up. When you try them, have the rest of the make-up on as well or it will be too much of a shock.
Some people positively swear by a lip liner and/or undercoat thing, I have never felt I needed one, your mileage may vary.
I do need non-chapped lips however or it all goes wrong. Lush do some lovely lip scrubs made of sugar which you can lick off, not that I ever use them just to do this.
People will recommend make-up counters, hm, mixed experience there. They see my dark hair and pale skin and try to put me in pink and it looks strange to me, it's a personality thing as well.