This is what I've been doing lately, but you can get these Sally Hansen sticker nails that look like these image.dhgate.com/albu_201689469_00/1.0x0.jpg and you stick them onto your nails and use the filer to shape them to your nail shape. They come in so many designs, and you don't need to wait for them to dry or anything. Just pop them on and GO!
Clean your nails, cut them to the same length, get a cute bright colour (maybe a light blue?) the put tape on the lower part of your nails to leave the white top part of your nails free. Then paint the end the colour, remove the tape and tah da! Pretty cute nails :)
(terribly sorry about my punctuation and grammar... I'm awful, I know!)