Before asking a girl out for a date, you may want to talk to her first. You should have some conversations with her by text, email or phone. This will not seem so awkward when you ask her out for a date. If you had never spoken to a girl before asking her out for a date, it may seem awkward to ask a girl out for a date without really knowing her. She would probably look at you strange. Instead, get to know her first.
Talk to her about her likes and dislikes. Also, you will want to tell her things about you. Then after a while, you could text or ask her to go to a small date like getting a cup of coffee or a meal at a nice restaurant.