If you have no confidence in your own powers but you like the girl very much you can use a trick that is certain to help you. Attach a present to your first introduction letter! It can be something quite cheap but pleasant to every woman: one or three roses (in Russia it is not allowed to present people with an even number of flowers), a soft toy or some sweets. If your woman is well brought up she will certainly answer you at least to thank. Try not to miss this chance and get her interested in your further correspondence.
Well, if the girl is not very well brought up and even doesn’t thank you, be happy to have known this sad fact at the very beginning of your communication but not after making ready a fiancée’s visa(.