O.K I am sorry if this is not very helpful as I am only familiar with SJP Lovely of the three you mentioned. It is exactly as its name suggests but how does it make you feel and what is your perception of it? One fragrance which you might also like is Narciso Rodriguez For Her, a bit deeper and darker than Lovely but has strong similarities.
When I wear Chanel No.19 I immediately feel focussed and 'put together', it's like the kind of instant confidence I get from wearing high heeled shoes
(I am short too!).
Be good to yourself and don't think you're out of your league, you will choose the best frag for yourself and I wish you all the best!