If the main problem is to become confident and attractive enough to approach and to ask a girl out for a date, then there are a lot of rules which can help you and improve your chances with attractive girls.
Remember that a girl is more than her appearance and try to know her better as a person, not just a lady with high heels and a pretty dress.
Less is more, so pretending to be someone else is not a good working method.
Nervousness can spoil your chances a lot: people who are too anxious about doing everything perfect can sometimes make silly mistakes and spoil their dating.
Only a person who does nothing is flawless, so just be yourself and try your best to have the best possible experience of dating girls.
In general, most of the guys have a pretty average appearance which can be improved by putting a little bit of effort and time in it.