You are perfectly normal! As you get older, you will get much taller. Boys have a slower growth spert than girls. As for the sex, and kissing/groping question! Again, you're normal! Know one is born, knowing how to do these things, they learn as they go! Each person kiss's differently in some way. One girl might like how you kiss, and another girl may not.
When you're ready, you will meet a nice girl, and all this will come naturally. A lot of times, the girl will kiss you first! She will also take your hand in hers as well. Groping is something that comes with excitement! Not a learned process, it just happens when two people are in the heat of passion. So, chill dude.Lol..You're going to be fine!