How to ask her out in a straight forward manner?

Cut out the 'beating around the bush' part (because it gives the impression that you have been and in fact are beating around the bush and so you are not confident). Cut out the 'spare your time' part because it makes you sound like you're not worthy. Say something along the lines of 'hey, look, I know that we're both really quite good looking and all but surely we must have something else in common? Waddaya say we *insert unique idea for a date along with a time here* and find out??*'.