What counts here is whether you are following the urges of your hormones or if you really like this girl.
The difference is that one - you feel you have to plan just because you think it's time it should happen (not the best idea).
The other is the feelings you two have for each other, and that should spontaneously happen, no matter where you are - so there is no need to 'plan' this or look for a 'special place'.
Give yourself time, you'll know when that feeling is right between the both of you because you should also
notice the signals from her and respect them.
It's tough enough growing up and getting to know a new stage in life without having to go by what someone else said or by an unwritten law of puberty.
Just relax and don't worry so much about a 'schedule' of events. Let them happen naturally.
Good luck, and keep us posted.